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By submitting my email address. i certify that i am 13 years of age or older, agree to recieve marketing email messages from the princeton review, and agree to terms of use., how to survive mcat math without a calculator.

The MCAT is essentially a science test, but you’ll still need a solid grasp of math fundamentals to score big —and you cannot use a calculator.

Our experts compiled a list of MCAT math topics to prep for along with some tips for doing math calculations by hand.

## What math is covered on the MCAT?

The MCAT is primarily a conceptual exam, with little actual mathematical computation. Any math that is on the MCAT is fundamental: just arithmetic, algebra, and trigonometry. There is absolutely no calculus on the MCAT. Math-based problems will appear mostly in the Chemical and Physical Foundations of Biological Systems section . On the other science sections, a basic understanding of statistics as used in research will be helpful.

## MCAT Math Tricks

1. practice for not having a calculator..

You aren’t allowed to use a calculator on the MCAT, so you need to practice doing arithmetic calculations by hand. Fortunately, the amount of calculation you’ll have to do is small. See how you score on our free MCAT practice test .

## 2. You only have to be reasonably accurate.

Try to make approximations so that you can do the math quickly. On the Chem/Phys section, your MCAT time per question is approximately 1.4 minutes (95 minutes for 67 questions). There simply isn't time for lengthy, complicated math!

Here's how it works. Which of the following calculations for figuring out the value of 23.6 × 72.5 is faster?

In the one-step calculation on the right, we approximated: 23.6 ≈ 25 and 72.5 ≈ 70. The answer we got in just a few seconds differs from the precise answer by only 2%. For the MCAT, you should always try to approximate so that you can do the math quickly.

## Free MCAT Practice Tests & Events

Evaluate and improve your MCAT score.

## 3. Remember to pace yourself

If you find yourself writing out convoluted calculations on your scratch paper when you’re working through math-based MCAT problems, it’s important that you recognize that you’re not using your time efficiently. Say to yourself, “I’m wasting valuable time trying to get a precise answer, when I don’t need to be precise.”

## 4. Include some math review in your MCAT prep

Are you rusty in any of these areas? You'll want to brush up on a few key math concepts during your MCAT prep .

## Arithmetic, Algebra, Graphs

- Scientific notation, exponents, and radicals
- Fractions, ratios, and percents
- Equations and inequalities
- x-y plane, lines, and other graphs

## Trigonometry

- Pythagorean Theorem
- Sine, cosine, and tangent functions
- Sine and cosine values of common angles
- Inverse functions
- Radian measure
- Scalars and vectors
- Addition and subtraction of vectors
- Scalar multiplication
- Vector projections and components

## Proportions

- Direct proportions
- Inverse proportions
- Laws of logarithms

## Basic Statistics

- Mean, median, mode, range
- Standard deviation, normal distributions
- Variables, sample size, random samples, correlation
- Reliability, validity
- Randomized controlled trial, double-blind experiment

## Research Methods

- Graphical analysis and interpretation
- Determining whether results are supported by data presented in figures
- Demonstrating an understanding of basic statistics and research methods
- Interpreting data presented in graphs, figures, and tables
- Drawing conclusions about data and methodology

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MCAT and Organic Chemistry Study Guides, Videos, Cheat Sheets, tutoring and more

## Video Transcript: MCAT Antilogs Without A Calculator

June 9, 2014 By Leah4sci 1 Comment

( click here to watch on YouTube )

[Start Transcript]

Leah here from Leah4sci.com/MCAT and in this video, Iâll show you how to solve MCAT style Antilogs questions without a calculator. Â This video picks up from my last video where I show you how to solve logarithm based questions and you can find this video alongwith my entire series on solving MCAT Math without a calculator by visiting my website https://leah4sci.com/MCATMATH.

In the last video I showed you a trick on how to find a pH, pOH or pKa Â value when given a concentration or ka. The trick showed you that when you have a number times ten to a negative power, that power becomes your pka, your pH or your poH.

But what if now you are faced with a question where the actual pH, poH or pka value is given and youâre ask to find the concentration or the ka? For Â example you maybe given a question that says:

Find the ka of an acid whose buffer has a pH of 4.19 in a solution containing equal moles of acid and conjugate base.

Iâll cover the Science portion of this question in my Chemistry videos at leah4sci.com/MCATCHEMISTRY but for this video let focus just on the Math. Since weâre dealing with a buffer weâll use the HendersonâHasselbalch equation which says that pH is equal to pka plus the log of Conjugate base over acid.

Youâll also see this written as A minus over HA. Even though we have equal moles of acid and conjugate base or fifty-fifty, whatever number we have for conjugate base is the number for acid and that means we have a ratio of some number over itself or one.

The log of one is zero and that means this entire portion of the equation drops out telling me that the pH is equal to the pka. Knowing that the pH is equal to 4.19 equals the pka we know the pka is also equals to 4.19. But how do we use this to find the ka value of this acid? 4.19 is not a clean and easy number to calculate so letâs break it down:

The first thing you want to do is check how close your answer choices are to each other to see how much you can simplify and how quickly you can come up with the answer. Hereâs the equation weâll use. If pka is equal to negative log of ka (pka= -log ka), since log stands for log base ten, to solve for ka we have to have ten to the power of negative log to cancel out and that means we need ten to the power of negative pka. So the ka value is equal to ten to the minus pka which is equal to ten to the minus four point one nine (ka = 10^pka = 10^-4.19).

A nice and clean number like four would give us a ka value of one times ten to the minus four. But we also have to account for that 4.19 so we donât know weâre looking for the number close to one times ten to the minus four. If this is not enough to isolate your answer, you then want to find the range where your ka will fall out.

Weâll take the number 4.19 and round it down to 4 and up to 5. A pka of Â 4 has a ka of one times ten to the minus four, a pka of 5 has a ka of one times ten to the minus five. That means the number weâre looking for is somewhere in this range. But if this is still not enough, then you wanna go back to the trick where I showed you how to recognize the different numbers that give you different ranges. In review, if we have a number point one we get an eight time ten to the minus x. And I put Â x instead of the number because if we have 4.19 our exponent will be a number times ten to the minus five. Â So if we had 4.1 it will be eight times ten to the minus five.

A number point three will be five times ten to the minus that power. In this case, if we have 4.19, letâs round that to 4.2, remember on the MCAT you are allowed to round because it will be close enough. If point one gives me an eight and point five gives me a five then our answer has to be somewhere between eight and five so all you have to recognize is that the number is somewhere between five and eight. So itâll be five times ten to the minus five to eight times ten to the minus five.

Even if we havenât narrowed in on a specific number, for the MCAT this is close enough. In fact, punching ten to the negative four point one nine in the calculator I get an answer of 6.46 times ten to the minus five which on the MCAT is close enough. If you wanna narrow this down a little more, 4.19 is closer to 4.1 than it is to 4.3 and that means weâll be closer to the 8 than to the 5 as is evident by 6.46.

This concludes my video series on MCAT Math Without a Calculator. You can find this entire series on my website at https://leah4sci.com/MCATMath . You can find additional MCAT videos including Physics, Chemistry, Biology and Organic Chemistry on my website https://leah4sci.com/MCAT

Are you stuck on a specific MCAT topic? I offer Private Online Tutoring where I focus on your needs to strengthen your individual weaknesses. Tutoring details can be found using the link below or by visiting my website leah4sci.com/MCATTutor.

Are you overwhelmed by the sheer volume of information required for the MCAT? Are you worried that lack of a proper study plan and low MCAT score will prevent you from getting into Medical School?

My new ebook The MCAT Exam Strategy is 6-Week Guide to Crushing the MCAT will help you formulate a concrete study plan by helping you figure out where you stand now, identify your goals and figure out what it takes to reach them and itâs yours FREE when you sign up for my email newsletter at MCATExamStrategy.com.

By signing up for my email newsletter, youâll also be the first to know when I have new videos, MCAT Study Guide Cheat Sheets Tips and so much more! The link againÂ MCATExamStrategy.com.

[End Transcript]

Watch the Video Here:Â MCAT Math Video 9 – Antilogs

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## Organic Chemistry Reference Material and Cheat Sheets

## Alkene Reactions Overview Cheat Sheet – Organic Chemistry

The true key to successful mastery of alkene reactions lies in practice practice practice. However, … [Read More...]

Click for additional cheat sheets

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## Introduction To MCAT Math Without A Calculator

While the pre-2015 MCAT only tests you on science and verbal, you are still required to perform … [Read More...]

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## Organic Chemistry Tutorial Videos

## Keto Enol Tautomerization Reaction and Mechanism

Keto Enol Tautomerization or KET, is an organic chemistry reaction in which ketone and enol … [Read More...]

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- Main content

## Everyone's talking about OpenAI's Q*. Here's what you need to know about the mysterious project.

- A mysterious new OpenAI model known as Q* has got the tech world talking.
- The model is said to have sparked concern at the startup that led to the resulting chaos.
- AI experts say the model could be a big step forward but is unlikely to end the world anytime soon.

As the dust settles on the chaos at OpenAI, we still don't know why CEO Sam Altman was fired â but reports have suggested it could be linked to a mysterious AI model .

The Information reported that a team led by OpenAI chief scientist Ilya Sutskever had made a breakthrough earlier this year, which allowed them to build a new model known as Q* (pronounced "Q star.") The outlet reported that the model could solve basic math problems.

Sources told Reuters that this model provoked an internal firestorm , with several staff members writing a letter to OpenAI's board warning that the new breakthrough could threaten humanity.

This warning was cited as one of the reasons that the board chose to fire Sam Altman, who returned as CEO on Wednesday after days of turmoil at the company, Reuters reported.

The ability to solve basic math problems may not sound that impressive, but AI experts told Business Insider it would represent a huge leap forward from existing models, which struggle to generalize outside the data they are trained on.

"If it has the ability to logically reason and reason about abstract concepts, which right now is what it really struggles with, that's a pretty tremendous leap," said Charles Higgins, a cofounder of the AI-training startup Tromero who's also a Ph.D. candidate in AI safety.

He added, "Maths is about symbolically reasoning â saying, for example, 'If X is bigger than Y and Y is bigger than Z, then X is bigger than Z.' Language models traditionally really struggle at that because they don't logically reason, they just have what are effectively intuitions."

Sophia Kalanovska, a fellow Tromero cofounder and Ph.D. candidate, told BI that Q*'s name implied it was a combination of two well-known AI techniques, Q-learning and A* search.

She said this suggested the new model could combine the deep-learning techniques that power ChatGPT with rules programmed by humans. It's an approach that could help fix the chatbot's hallucination problem .

"I think it's symbolically very important. On a practical level, I don't think it's going to end the world," Kalanovska said.

"I think the reason why people believe that Q* is going to lead to AGI is because, from what we've heard so far, it seems like it will combine the two sides of the brain and be capable of knowing some things out of experience, while still being able to reason about facts," she added, referring to artificial general intelligence.

"That is definitely a step closer to what we consider intelligence, and it is possible that it leads to the model being able to have new ideas, which is not the case with ChatGPT."

The inability to reason and develop new ideas, rather than just regurgitating information from within their training data, is seen as a huge limitation of existing models, even by the people building them .

Andrew Rogoyski, a director at the Surrey Institute for People-Centered AI, told BI that solving unseen problems was a key step toward creating AGI.

"In the case of math, we know existing AIs have been shown to be capable of undergraduate-level math but to struggle with anything more advanced," he said.

"However, if an AI can solve new, unseen problems, not just regurgitate or reshape existing knowledge, then this would be a big deal, even if the math is relatively simple," he added.

Not everyone was so enthused by the reported breakthrough. Gary Marcus, an AI expert and deep-learning critic , expressed doubts about Q*'s reported capabilities in a post on his Substack .

"If I had a nickel for every extrapolation like thatâ'today , it works for grade school students! next year, it will take over the world!'âI'd be Musk-level rich," wrote Marcus.

OpenAI did not immediately respond to a request for comment from Business Insider, made outside normal working hours.

## IMAGES

## VIDEO

## COMMENTS

The log function is used to solve equations where the variable is an exponent with base 10. For example, 10 X = 100. The log operator allows us to solve for X and write an equivalent expression as log (100) = X. 10 X = 100 is the exponential form of the expression, and log (100) = X is the logarithmic form.

Therefore, learning a non-calculator trick for solving log questions is a must for every MCAT student. And that's why my newest video shows you how to quickly tackle simple negative log questions, and a trick for solving the more difficult questions, all without a calculator. Logarithms and Negative Logs Without A Calculator

Factoring out is the easiest way. For the MCAT, a good approximation will likely lead you to the right answer. A few easy things to remember: log (10 x) = x, likewise -log (10 x) = -x log (0.1<x<1) is something between -1 and 0 log (1<x<10) is something between 0 and 1 always convert to scientific notation, so 16x10 -10 = 1.6x10 -9

https://Leah4sci.com/MCATmath presents: Logarithms and Antilog shortcut quick solving without a calculator for the MCAT, GAMSAT, DAT and moređşWatch Next: Vo...

[Start Transcript] Leah here from Leah4sci.com/MCAT and in this video, I'll show you how to tackle logarithms style tackled questions without a calculator as it may show up on your MCAT.

Part 1: Introduction Part 2: Estimating and rounding numbers a) Multiplication b) Division c) Example problem Part 3: Logarithms a) Logarithm rules b) Common applications of logarithms c) Example problem Part 4: Strategies for eliminating answer choices a) Significant figures b) Exponents c) Example problem Part 5: Fractions

log10 = log (5**2) = log5 + log2 = 0.7 + 0.3 = 1 log8 = log (4**2) = log (2**2**2) = log2 + log2 + log2 = 0.3 + 0.3 + 0.3 = 0.9

You wont need to do anything but discern between 4 answers for the mcat. So if you're calculating a pH from an [h+] of like, 1.6 x 10 -âľ just select the answer that's between pH 4 and pH 5. There won't be two answers in this range. throwitaway348493 â˘ 3 yr. ago

Yes. Are you allowed to use a calculator on the MCAT? No! But somehow, you still need to work through multi-step calculations, including everything from decimals and exponents to trigonometry and logarithms. And did I mention that there's no calculator on the MCAT?

1. Practice for not having a calculator. You aren't allowed to use a calculator on the MCAT, so you need to practice doing arithmetic calculations by hand. Fortunately, the amount of calculation you'll have to do is small. See how you score on our free MCAT practice test . 2. You only have to be reasonably accurate.

EASY WAY TO SOLVE FOR -log 55 comments Best Add a Comment WassilyJ â˘ 3 yr. ago â˘ Edited 3 yr. ago If anyone is wondering why this works, I'll just attempt to explain it. Hopefully the explanation finds it useful to someone. There's a log property, where: Log (a*b) = log (a) + log (b)

http://leah4sci.com/MCAT Presents: MCAT Math Without A Calculator Video 8 - Solving MCAT logarithm calculations without a calculatorđşWatch Next: Logarithms ...

This video picks up from MCAT Math Part 8 - Logs and Negative Logs showing you how to solve questions where the log value is provided. Instead you're asked to solve for the anti-log value in questions relating to ion concentration and Ka values. Anti-logs, just like logarithms, are difficult to calculation without a calculator [âŚ]

Solving Antilog MCAT Questions Without A Calculator This video picks up from MCAT Math Part 8 - Logs and Negative Logs showing you how to solve questions where the log value is provided. Instead you're asked to solve for the anti-log value in questions relating to ion concentration and Ka values.

Here's the equation we'll use. If pka is equal to negative log of ka (pka= -log ka), since log stands for log base ten, to solve for ka we have to have ten to the power of negative log to cancel out and that means we need ten to the power of negative pka.

Can't hurt to keep the log trick in your back pocket though: -log (x * 10^-y) = y - 0.x will give you an approximation. Also not important, but if it makes you feel better ln (x)= 2.3* log (x) DatEz 524 (131/130/131/132) â˘ 4 yr. ago Know these for sure just in case!

Lets say you need to calculate this to find pH: -log (1.6 x 10 -4) To calculate that, take the base number (the 1.6, idk if its actually called the base lol), move the decimal one unit left, and subtract it from the exponent 4 (ignore the negative on it) So in this case, you'd go 4 - 0.16 = 3.84 which would be ur pH. TwoSides1 â˘ 7 yr. ago ...

0:00 / 3:04 MCAT: Anti log without a calculator MVP Series 261 subscribers Subscribe 198 Share 19K views 7 years ago MCAT Prep: In this video we show you how to find the negative log...

I arrive at the proper formula doing problems with pH, Ka, Kb etc., but miss the answer because I have trouble solving the ln or log portion of the equation. comments sorted by Best Top New Controversial Q&A Add a Comment ksaado ... r/Mcat â˘ 497 diagnostic in Jan â> 520 on May 26th đ Thank you to all the community members who helped me. ...

In this Video I have explained about logarithm and how to use them to solve questions..#log #Mcat_basics #MCAT_Physics

https://Leah4sci.com/MCATMath presents: MCAT Math Without A Calculator Video 9 - Solving MCAT antilog calculations without a calculatorđşWatch Next: 5 Tips t...

CN: the logs on compute node: C1 - the installation logs will be saved to /var/log/xcat/xcat.log file on CN. C2 - the debug trace ( set -x or -o xtrace) of bash scripts enabled. C3 - the installer logs will be saved to the CN in /var/log/anaconda for RHEL, /var/log/YaST2 for SLES, /var/log/installer for UBT. N - the logs will not be saved to CN.

Here's what you need to know about the mysterious project. Sam Altman is back as OpenAI CEO after several days of chaos at the company. A mysterious new OpenAI model known as Q* has got the tech ...

Electric cars are supposed to be the future, but they still have issues that are keeping away many car buyers. The range is too short. The batteries are too heavy and expensive. They take too long ...

The New York Fed's Global Supply Chain Pressure Index saw a record-low reading last month, a sign that the worst of the supply jams is behind us. A White House official said there is likely more disinflation to come from the supply channel, citing more capacity for companies to bring prices back down as their own input costs fall.

MCAT Prep: In this video we show you how to find the negative log without a calculatorVisit our website at http://www.mcat-mvp.com/MCAT2015 to learn more abo...