Multiple choice

In the following number series find the wrong term. 1250 1201 1166 1140 1124 1115 1111

  1. 1140

  2. 1115

  3. 1111

  4. 1166

  5. 1250
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Find the pattern: 1250 - 1201 = 49 = 7², 1201 - 1166 = 35 (not a square), 1166 - 1140 = 26, 1140 - 1124 = 16 = 4², 1124 - 1115 = 9 = 3², 1115 - 1111 = 4 = 2². The pattern is subtracting squares in decreasing order: 7², 6², 5², 4², 3², 2². So after 1250 - 7² = 1201, we should have 1201 - 6² = 1201 - 36 = 1165 (not 1166). The term 1166 is wrong - it should be 1165. Option D is correct.

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