Question

In how many ways 2500 can be written as a product of two different factors?

• A. 7
• B. 6
• C. 15
• D. 16

Answer 1

The correct option is A 7

2500 = $2^2\times 5^4$
Number of factors = $3\times 5=15$
Number of ways = $\frac{15-1}{2}=7$