Discussion of Question with ID = 058 under Missing-Numbers

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Question

Three triplets are shown. Find the missing number in the third triplet.

13 (168) 13, 14 (181) 13, 15 (?) 13, . . .

A

190

B

194

C

195

D

196

Soln.
Ans: d

As, 13 × 13 = 169 ⇒ 169 − 1 = 168.

14 × 13 = 182 ⇒ 182 − 1 = 181

Similarly, 15 × 13 = 195

195 − 1 = 194


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