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Help with timing - gmat in 2 days

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Help with timing - gmat in 2 days

by gmatbschool » Mon Jun 29, 2009 7:43 pm
Unfortunately I am realizing too late that I need to address timing in Quant. I left the GMATPrep until the last week and now I am noticing that I am pressed for time in the last few questions.

The good news is that I am able to finish, albeit a bit rushed, and I think salvaging just a minute or two would help.

I think it is calculations mostly. Like figuring out which fractions are bigger...

Anyone have any tips?
What are some last minute things I could do watch for this?
What do you do when you are struggling with a question?
Or how do you speed up?
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by DanaJ » Mon Jun 29, 2009 10:41 pm
Some tips:

Don't write everything down. Taking long notes will reduce your speed and make it harder to navigate between various stuff you've got written down.

Use mental math a lot. For instance, how much is 32*11? This would normally take a lot of time to calculate, but not if you notice a few things:

32*11 = (30 + 2)*11 = 30*11 + 2*11 = 3*11*10 + 22 = 330 + 22 = 352. Took me about 5 seconds to calculate.

Another example: is 152 divisible by 11? You should already know all the squares up to 15 by now, so you'll know that 121 = 11^2. Then start adding multiples of 11 until you hit something close to 152. I started adding 22: 121 + 22 = 143. This is 9 units away from 152, so you can safely say that 152 is not divisible by 11. Again, 5 seconds.

Memorize important data: squares up to 15 (at least), some cubes (up to 5 maybe), other important powers of 2 and 3 (for instance, it's really important to know that 2^10 = 1024).
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