Concept: Number of Zeroes in Expression

Question

Find the number of zeros in following expression
13 * 15 * 22 * 125 * 44 * 35 * 11

Step 1: Do the Factor representation

Step 2:
For number of zeros in expression, look at the number of possible pairs of (2 * 5)
If you look above you will observe that only three pairs of (2 * 5) are possible
That is (2*5) * (2*5) * (2*5)

Hence in the expression there will be three zeros