The greatest number that exactly divides 105, 1001 and 2436 is:

The greatest number that exactly divides 105, 1001 and 2436 is:

A 3

B 7

C 11

D 21

Solution

Correct Answer: Option B

105=3×5×7

1001=7×11×13

2436=2×2×3×7×29

so, H.C.F=7