Neha visits the library every 4 days, Rakesh every 6 days and Salma every 10 days. All three visited on 1 March. On which date will all three next visit on the same day?

Explanation

1. 01

   They meet again after $\operatorname{LCM}(4, 6, 10) = 60$ days.

2. 02

   March has 31 days, so 30 days after 1 March is 31 March.

3. 03

   30 more days is 30 April.