What number comes next in the series 1, 6, 7, 13, 20, 33, ...?

Answer and explanation

Correct answer: C. 53

  1. Step 1: Each term is the sum of the two before it, so the next term is 20 + 33 = 53. Answer: 53. Why not the others: 66, 54 and 46 don't fit.

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