1. ## Integers

Hello, I'm studying for the GMAT and can use all the help i can get. Thank God for you all and the math help forum.

Here's my question:

The Product of 26,11,3 is closet to which of the following powers of 10?

a) 10^4
b) 10^3
c) 10^5
d) 10^2

I know the answer is b) 10^3, but i had to multiply the entire problem out.

I wanted to know, is there a short handed way to answer this problem. If so, it'll save me valuable seconds on the GMAT. Any help would be greatly appreciated.

Thanks,

2. ## Re: Integers

Originally Posted by plstevens
Hello, I'm studying for the GMAT and can use all the help i can get. Thank God for you all and the math help forum.

Here's my question:

The Product of 26,11,3 is closet to which of the following powers of 10?

a) 10^4
b) 10^3
c) 10^5
d) 10^2

I know the answer is b) 10^3, but i had to multiply the entire problem out.

I wanted to know, is there a short handed way to answer this problem. If so, it'll save me valuable seconds on the GMAT. Any help would be greatly appreciated.

Thanks,

shorter than multiplying 3 small numbers?...

I guess you could say 26 is close to 25, 11 is close to 10, so it's about 25*10*3 = 750.

The fastest thing I can think of here is 26 is about 25, 3 is about 4, 11 is about 10, 4x25 is 100 x 10 is 1000 = 10^3

3. ## Re: Integers

Yes, questions like this one is put on the GMAT so that you can waste time multiplying, am I right?

I think theres some rule of 10s that may apply here, am i wrong?