Question

Mary's mother has 3 kids, April, May, and ?

Answer 1

June, since the months of the year are in sequential order and they come one after another. This is the sequence for the whole year: January, February, March, April, May, June, July, September, October, November, and December, but June is the answer.

Answer 2

Mary's mother has 3 kids, April, May, and "Mary" herself.

Hope this helps!