11, 13, 17, and 19
1,2,3,4,5,6,10,12,15,20,30,60
The three numbers go into any integer multiple of 880.
The prime numbers between 10 and 20 are 11, 13, 17, and 19.
6 numbers can go into 20; they are 1, 2, 4, 5, 10 and 20.
11 13 17 19
1 and 11.
five (including 20)
2,7,11 2 x 7 x 11 = 154 2 + 7 + 11 = 20
The prime numbers between 10 and 20 are 11, 13, 17, and 19.
They are: 2+7+11 = 20
1 and 11.