Keerthana
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311 + 312 + 313 + 314 is divisible by _____.

a

7

b

8

c

11

d

14

Answer : Option B
Explanation :

311 + 312 + 313 + 314

= 3¹¹ (1 + 3 + 3² + 3³)

= 3¹¹ (1 + 3 + 9 + 27)

= 3¹¹ × 40 जो 8 से पूर्णतः विभाज्य है।

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