Multiple choice

Find the missing number (P) in the following series. (127, P, 85, 67, 51, 37, 25)

  1. 105

  2. 100

  3. 95

  4. 90

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Find the difference pattern: 127-P=?, P-85=?, 85-67=18, 67-51=16, 51-37=14, 37-25=12. The differences decrease by 2 each time: ?, ?, 18, 16, 14, 12. Working backwards: difference before 18 is 20, difference before 20 is 22. So P-85=20, meaning P=105. Check: 127-105=22. This fits the pattern. Option A (105) is correct.

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