which numbers are prime numbers 37,39,41,43 answer 37,41,43

John spent 1/3 of his study time doing math homework and 3/5 preparing for a history exam what fraction of his study time remains? answer 1/15

Solve for the unknown 2/7/20=1.6/ranswer 112

2 answers

37,41,43 - right!

1/15 - right!

112 - right!
What are prime numbers