Add them together and divide by 6.
To find the average, add up all the numbers and then divide the sum by the number of numbers you added. 7+11+21=39 39/3=13 The average is 13.
He is 19. His birthday is 11/13/199111-13-91
Yes there were the numbers of them were 1, 11, 13, 15, 19, and 21
There are 8 numbers. So you need to find the average of the 4th and 5th numbers when they are placed in order. So, average of 16 and 19 = 17.5
The prime numbers between 10 and 21 are 11, 13, 17, and 19.
2 3 5 7 11 13 17 19
21
11, 13, 15, 17, 19, 21, 23
9, 11, 13, 15, 17, 19, 21
13 and 19.
21 and 23
21 and 23