Question

$4^{61} +4^{62}+4^{63}$ is divisible by :

• A. 3
• B. 2
• C. 6
• D. 9

Answer 1

Answer:

A. 3

Let we take $4^{61}$ as common.,$4^{61}+4^{62}+4^{63} = 4^{61}(1+4+4^2)$

$=4^{61}\times21$from the option, 21 is divisible by 3 so the number is divisible by 3.