Problem Solving

tans wrote:how to find cube of 1.18 for eg quickly?

I can assure you that the GMAT will not require you to calculate 1.18³ to any degree of accuracy.
Are you referring to a specific question?

Cheers,
Brent

Hi tans,

I agree with Brent that you would not be expected to perform that calculation on Test Day. Assuming that you're actually dealing with a GMAT question, there will likely be some other approach/tactic you can use instead of cubing 1.18, including rounding/approximation, eliminating answers that are too big or too small, etc.

For example, 1 < 1.18 < 1.2

1³ = 1
1.2³ = (6/5)(6/5)(6/5) = 216/125 = less than 2

So 1.18³ has to be between 1 and 2.

GMAT assassins aren't born, they're made,
Rich