1.0
The number halfway between 7 and 31 is 19.
halfway between 31 and 37 is (31 + 37) / 2 = 68 / 2 = 34.
Halfway between 31 and 32 is 31.5 (thirty-one and a half).
19.5 is halfway between 18 and 21
There is no distance between them.
22
it is: 22
24
42
37
21
Yes.