Question

What is the only number between 20 and 30 to have an odd number of factors?

Answer 1

Answer:

25

Step-by-step explanation:

21,22,23,24,25,26,27,28,29

21= 1,3,7,21 = 4, isn't

22= 1,2,11,22 = 4, isn't

23= 1,23 = 2, isn't

24= 1,3,4,6,8,24 = 6, isn't

25= 1,5,25 = 3, it is

26= 1,2,13,26 = 4, isn't

27= 1,3,9,27 = 4, isn't

28= 1,2,4,7,14,28 = 6, isn't

29= 1,29 = 2, isn't