Multiple choice

Complete the given series 66,36,18.....

  1. 3

  2. 6

  3. 8

  4. 9
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The pattern follows decreasing subtractions: 66-30=36, 36-18=18, 18-10=8. The amounts subtracted (30, 18, 10) decrease by 12, then 8, then 4 - each reduction is half of the previous reduction. This gives the next term as 8, though the pattern is complex and not immediately obvious.

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