Question

If a kindergarten teacher seats the class with four children on each rows there will be three children who will not have a seat however if five children are seated in each row there will be two empty seats what is the least number of children the class would have?

Answer 1

your number when divided by 4 leaves a remainder of 3
when divided by divided by 5, leaves a remainder of 2

numbers which fit the first case:
7 11 15 19 23 27 31 35 39

numbers which fit the 2nd case:
7 12 17 22 27

the least number would be 7, but I have a feeling they are looking for 27

check:
7 ---> one row of 4, with 3 left over
7 ---> one row of 5, with 2 left over

27 ---> 6 rows of 4, with 3 left over
27 ---> 5 rows of 5, with 2 left over