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Find the number in the place of question mark. 21, 25, 34, 50, ?, 111, 160

Question and options

Find the number in the place of question mark.
21, 25, 34, 50, ?, 111, 160
  1. 86
  2. 72
  3. 75
  4. 59

Answer and explanation

Correct answer: C - 75
Differences are 4, 9, 16, 25, 36, 49 (squares of 2 to 7). So the missing term is 50 + 25 = 75; check 75 + 36 = 111, 111 + 49 = 160.

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  • CUSAT CAT LLM

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