1.85
9
Halfway between 18 and 28 is (18 + 28) ÷ 2 = 23.
It is 13, the number halfway between the two middle numbers.
36
(14 + 18)/2 = 16
11.5
19.5 is halfway between 18 and 21
Halfway between 18 and 28 is (18 + 28) ÷ 2 = 23.
The number halfway between 18 and 60 is (18 + 60)/2 = 39.
It is 13, the number halfway between the two middle numbers.
It is 32, the number halfway between the two middle numbers, when they are arranged in order.
It is 20
36
(14 + 18)/2 = 16
It is: (18+21)/2 = 19.5
(13 + 23)/2 = 18
(5 + 13)/2 = 18/2 = 9
The single number directly between those two numbers is 18.