221
The whole number between 13 and 17 is 15
Meet the Browns - 2009 Meet the Church Board 3-17 was released on: USA: 13 January 2010
n + 20 - 17 + 13 - n = 20 - 17 + 13 = 3 + 13 = 16
17
Themselves and their multiples because 17 and 13 are both prime numbers.
221
13
17.
17+17+17=51
The are 11, 17 and 24.
15 and 17
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.