Decimal DNA (Money & Measure)

There are 31 students. Each student needs 10 pencils.

There are 33 students. Each student needs 13 pencils.

There are 37 students. Each student needs 8 pencils.

There are 50 students. Each student needs 8 pencils.

There are 43 students. Each student needs 14 pencils.

There are 40 students. Each student needs 5 pencils.