many zeros are there

[sanju09]

How many zeros are there at the end of the product 33 x 175 x 180 x 12 x 44 x 80 x 66?
(A) 2
(B) 4
(C) 5
(D) 6
(E) 7

[4GMAT_Mumbai]

Hi,

33 x 175 x 180 x 12 x 44 x 80 x 66

= 3 * 11
* 5 * 5 * 7
* 5 * 2 * 2 * 3 * 3
* 3 * 2 * 2
* 2 * 2 * 11
* 2 * 2 * 2 * 2 * 5
* 2 * 3 * 11

Hence, there are four 5's and eleven 2's. These will combine to give four 10's.

Hence, # of zeroes is 4.

[selango]

To find the number of zeroes,we need to find number of 10's.

Number of 10's s actually provided by number of 5's.

In this product there are 4 5's.So there will be 4 10's

Hence 4.