Multiple choice

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series. 87, 84, 82, 81, 77, 78, ?, ?

  1. 76, 75

  2. 72, 75

  3. 76, 74

  4. 75, 73
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is an alternating series. Odd positions: 87, 82, 77, ? (subtract 5 each time). Even positions: 84, 81, 78, ? (subtract 3 each time). Following the odd position pattern: 77-5=72. Following the even position pattern: 78-3=75. The missing terms are 72, 75.

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