Multiple choice general knowledge math & puzzles

What decimal of an hour is a second ?

  1. 0.027

  2. 0.00256

  3. 0.00027

  4. none

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

One second equals 1/3600 of an hour (60 seconds × 60 minutes = 3600 seconds per hour). Therefore, 1 ÷ 3600 = 0.000277... The correct answer 0.00027 is a reasonable approximation to two significant decimal places.