Multiple choice general knowledge math & puzzles

There are 200 questions on a 3 hr examination. Among these questions are 50 mathematics problems. It is suggested that twice as much time be spent on each math’s problem as for each other question. How many minutes should be spent on mathematics problems

  1. 36

  2. 72

  3. 60

  4. 100

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

Let time for a non-math question be x. Then math is 2x. Total time is 50(2x) + 150(x) = 250x. 180 minutes / 250 = 0.72 minutes per x. Math time = 100x = 100 * 0.72 = 72 minutes. Other options do not satisfy the 2:1 ratio and 180-minute limit.