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Find the missing number in the following series 1, 8, 9, 64, 25, ?, 49

Question and options

Find the missing number in the following series
1, 8, 9, 64, 25, ?, 49
  1. 210
  2. 212
  3. 214
  4. 216

Answer and explanation

Correct answer: D - 216
Odd positions are squares of odd numbers (1, 9, 25, 49) and even positions are cubes of even numbers (8, 64, ?): next is 63=2166^3 = 216.

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