Question

Use least common multiple or greatest common divisor to solve the problem.

Three clocks chime every 15 minutes, 39 minutes, and 65 minutes,
respectively. If the three clocks chime together, how much time must pass
before they will chime together again?

Answer 1

Explanation:

3) 15,39,65

_________

5 )5,13,65

--------------

13 )1,13,13

----------------

| 1,1,1

L.C.M.=3×5×13=195

They will chime together after 195 minutes.