RRB Assistant Loco Pilot and Technician Model Paper 17 with key

Question : 53 of 75

Marks: +1, -0

4^{61} +4^{62}+4^{63}+4^{64}

is divisible by:

Solution:

4^{61}

[1 + 4 + 16 + 64]
⇒

4^{61}

[85]
⇒

4^{61}

× 5 × 17
So, it is divisible by 17

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