Multiple choice general knowledge math & puzzles

Supposing a clock takes 7 seconds to strike 7.How long will the same clock take to strike 10?

  1. 10.5 seconds

  2. 10 seconds

  3. 11 seconds

  4. 9.5 seconds

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When a clock strikes 7 times, there are 6 intervals between the strikes (not 7). If 6 intervals take 7 seconds, each interval takes 7/6 seconds. For 10 strikes, there are 9 intervals, so the total time is 9 × (7/6) = 63/6 = 10.5 seconds. The key insight is counting intervals between strikes, not the strikes themselves.