Question

what number is a prime
4
13
26
15
Ms. Sue
https://www.mathsisfun.com/prime_numbers.html
Jack Armed
he did well but needs to do quicker I can tell he tried his best but he needs more help on questions 3,11,12,15,18,21,22 and 29 number 1 he did right but I can tell he struggled a lot he score was 7/40