Question

Sia buys a pen, a pencil and an eraser every 6th, 4th and 8th day respectively. If she bought all three of them on 1st Jan, the next time when she will buy all three of them together is:

A. 24th Jan

B. 12th Jan

C. 25th Jan

D. 13th Jan​

Answer 1

Solution :-

Finding LCM of 6 , 4 and 8 we get,

→ 6 = 2 * 3

→ 4 = 2 * 2

→ 8 = 2 * 2 * 2

So,

→ LCM = 2 * 2 * 2 * 3 = 24

now,

→ She bought all three of them = On 1st Jan .

then,

→ She will buy all three of together = 1 + 24 = 25th Jan (A) (Ans.)

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