Question

Prasad goes to the market once in 5 days and Raju goes once in 4 days. They met today. after how many days will they meet again?

Answer 1

Answer:

20 day

Step-by-step explanation:

just take LCM of 4 and 5

answer will come 20

Answer 2

Answer:

20 days.

Step-by-step explanation:

Method 1:

Let us assume today was 1st day of the month.

L.C.M of these two numbers (5,4) = 20.

They both meet again after = 20 + 1 = 21st of the month.

Method 2:

Prasad goes once in 5 days => 1, 5, 11, 16, 21, 26

Raju goes once on 4 days => 1, 5, 9, 13, 17, 21, 25.

So the common day for both Prasad and Raju is 21.

Hence they will meet again after 20 days i.e. 21st if we assume today is 1st.