The remainder when 3^ 91 divided by 80 is :- - Vidyadip

MCQ

The remainder when $3^{91}$ divided by $80$ is :-

A
$3$
B
$1$
C
$9$
✓
$27$

✓

Answer

Correct option: D.

$27$

d
$3^{91} = 3^3 . (3^4)^{22} = 27 (80 + 1)^{22}$ So remainder is $27(1)^{22} = 27$

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