The number halfway between 13 and 21 can be found by taking the average of the two numbers. Add 13 and 21 together to get 34, then divide by 2 to get 17. Therefore, the number halfway between 13 and 21 is 17.
They are: 11 13 17 19 23 and 29 which makes six of them
13
> 1, 3, 5, 7, 11, 13, and 17 1 is not a prime number, but 2 and 19 are. The correct answer is 2, 3, 5, 7, 11, 13, 17, and 19.
For a number to have [only] 2 factors, it must be a prime number; the prime numbers between 0 and 20 are; 2, 3, 5, 7, 11, 13, 17, 19
The number halfway between 13 and 21 can be found by taking the average of the two numbers. Add 13 and 21 together to get 34, then divide by 2 to get 17. Therefore, the number halfway between 13 and 21 is 17.
11 and 13 13 and 17 17 and 19
11 13 17 19.
11, 13, 17, 19
11 13 17 19.
11, 13, 17, 19
11 13 17 19
11 13 17 19.
The prime numbers between 10 and 20 are 11, 13, 17, and 19.
11, 13, 17, 19
This is the list: 2 3 5 7 11 13 17, so there are 5 number between 2 and 17.
It is 13: 2, 3, 5, 7, 11, 13, 17 . . .