Question

The numbers 1 to 1000 are written on a paper. If n is the number of times digit 5 appears, then n can be expressed as the product of two natural numbers in 18 ways.

• A. True
• B. False

Answer 1

The correct option is B False

'5' on unit place $\to 100$
'5' on tenth place $\to 100$
5 on hundred th $\to 100$
$\to 300=3^1\times 2^2\times 5^2$
Ans. $\frac{2\times 3\times 3}{2}=9$