Multiple choice

Directions: Find the wrong term in the following series. 1020, 508, 252, 124, 60, 28, 12, 6

  1. 6

  2. 28

  3. 60

  4. 124

  5. 252
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The pattern is (x + 4) / 2 = next term. 1020 -> 512 (not 508). 512 -> 258. The series is clearly not following a simple division rule. Checking differences: 1020-508=512, 508-252=256, 252-124=128, 124-60=64, 60-28=32, 28-12=16, 12-6=6. The last term 6 should be 4 (12-8=4).

AI explanation

The series follows the pattern of dividing by 2 and subtracting 2 to get the next term. Following this rule, 1020 / 2 - 2 = 508, 508 / 2 - 2 = 252, and 252 / 2 - 2 = 124. Continuing down the sequence, 60 / 2 - 2 = 28, 28 / 2 - 2 = 12, and 12 / 2 - 2 = 4, which means the final term should be 4 instead of 6.

Keep practicing — related questions