Manu goes to dance class once in every 6 days, to karate class once in every 12

Question

Manu goes to dance class once in every 6 days, to karate class once in every 12 days and to art classes once in every 18 days. He attends all the three classes on 1st of April. On which day, will he attend all the 3 classes again?

Options:

A . 8th May

B . 7th May

C . 1st May

D . 21st April

Answer: Option B
:
B
He will go to all the 3 classes on the day which is LCM of 6, 12, 18.

Manu Goes To Dance Class Once In Every 6 Days, To Karate Cla...

LCM

= 2 \times 3 \times 2 \times 3 = 36

If he attends all the three classes on 1st of April, then he will attend all the three classes after 36 days which is 7th May.

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