Question

Zoo keepers plan an enrichment day for the animals every 7 days and bathe the elephants every 2 days. You want to go to the zoo when both events are happening. what other in may date will this happend

Answer 1

The next date when both events will happen is 9 days from the original date.

Answer 2

Ignoring the poor grammar in the question,
we want the LCM of 7 with 2 which would be 14, not 9

e.g. days of enrichment: 7, 14, 21, 28, ...
days for bath: 2, 4, 6, 8, 10, 12, 14, 16
so the first number showing up on both lists is 14

Answer 3

28

Answer 4

Yes, 28 days would be the next date when both events happen again.