Multiple choice

In the following question, select the missing number from the given series. $672, 666, 660, 654, ?$

  1. $648$
  2. $646$
  3. $650$
  4. $640$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The series 672, 666, 660, 654 decreases by 6 each time: 672−6=666, 666−6=660, 660−6=654. Continuing this pattern, 654−6=648. Option B (646) would require decreasing by 8, option C (650) would require an increase of 4, and option D (640) would require decreasing by 14, none of which follow the pattern.

Keep practicing — related questions