Mcat math

[chiddler]

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I was doing a pH question and with approximations I got 2.4. Berkeley review had 2.4 and 2.6. The latter is correct!

So. Will the mcat have similar questions where two numbers differ by a very small amount? Or are big approximations like what I did ok?

 

[MedChad]

I have only taken it once thus far, but it seemed like sometimes approximations like yours would be fine, while other times 2.4 and 2.6 are a big difference. So lets just hope we get the approximation instead of the .2 difference question, haha.

 

[milski]

But it's multiple choice, so you have all the possible values, right? I mean, if you have 2.4 and 2.6 as possible answers, you would know that you have be precise enough to distinguish between the two.

 

[MedPR]

What was the problem?

 

[MedPR]

I think I know which problem you were doing, and I believe you get 2.6 if you use TBR's log trick (log2=.3)

 

[chiddler]

I think I know which problem you were doing, and I believe you get 2.6 if you use TBR's log trick (log2=.3)

yup. but i did a dirtier approximation although faster.

i suppose if i practice their trick though, it'll be just as fast and more accurate. i should do that.

 

[MedPR]

yup. but i did a dirtier approximation although faster.

i suppose if i practice their trick though, it'll be just as fast and more accurate. i should do that.

I've found their trick to be very useful, at least for the problems in their passages. To be honest, I can handle logs faster than I can add/subtract right now. I need to find an elementary algebra book that has tons of adding/subtracting/multiplying/dividing problems.
log2=.3
log3=.48

I've also memorized that log7=.85, but haven't had to use it much.