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CAT 1995 — QA Question 32

Number TheoryEasy

Three bells chime at an interval of 18 min, 24 min and 32 min. At a certain time they begin to chime together. What length of time will elapse before they chime together again?

Answer & solution

Correct answer: 4 hr and 48 min

  • A

    2 hr and 24 min

  • 4 hr and 48 min

  • C

    1 hr and 36 min

  • D

    5 hr

Solution

The bells will chime together after a time that is equal to the LCM of 18, 24 and 32 = 288 min = 4 hr and 48 min.

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CAT 1995 QA Q32: Three bells chime at an interval of 18 min, 24 min and 32 min. At a certain time they begin to chime together. — Solution | TheCATExam