Cares wrote:

Are we expected to know sqrt of non-perfect squares?

I'm doing a MGMAT problem which required me to have knowledge of what sqrt2 and sqrt3 is. I can generally estimate but didn't know that they were ~1.7 and ~1.4. When I generally estimated I could make an educated guess but the problem is that the answer choices were so close that it was hard to guess.

Basically I needed to be able to estimate

\frac{sqrt3-sqrt2}{1}

Answers had 20%, 25%, 30%, 35%, 40% as choices.

Hi Cares,

You may remember the following square roots:

\sqrt{2}=1.41

\sqrt{3}=1.73

\sqrt{5}=2.24

\sqrt{6}=2.45

\sqrt{7}=2.65

\sqrt{8}=2.83

\sqrt{10}=3.16,

but I believe that in GMAT there won't be any questions requiring the decimal values of square roots. Also, there are no close enough choices in GMAT.

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