It is 16, the value halfway between the two middle numbers.
It is: (13+41)/2 = 27
2713 + 41 = 5454 / 2 = 2727 is halfway between 13 and 41.
It is 13, the number halfway between the two middle numbers.
17.5
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
Well, darling, the number halfway between 11 and 15 is 13. You see, it's smack dab in the middle of those two numbers, like the cherry on top of a sundae. So, there you have it, 13 is the magic number in this case.
it is: 22
It is 13
18.5
22