Dividing into smaller groups

This task is about whether numbers can be divided into equal-sized groups.

Question 1Change answer

 
Which of the following 11 groups can be divided into smaller groups of equal size? 
 
Select "Yes" if it can be divided equally, or "No" if it cannot.
 
23 students YesNo
24 students YesNo
25 students YesNo
26 students YesNo
27 students YesNo
28 students YesNo
29 students YesNo
30 students YesNo
31 students YesNo
32 students YesNo
33 students YesNo
 

Question 1Change answer

 
A Polyfest group had 36 students in it. They needed to be divided into at least two smaller groups.
Each group needed to be the same size. 
 
List all the possible group sizes that their Polyfest group could be divided into so there were the same number of students in each smaller group.