6.45
6.45
It is: (63+57)/2 = 60
It is: 48
It is: 75
42
There are lots of numbers between 63 and 720. Exactly halfway between them is 391.50, so that may be the answer you are looking for.
26.5
42
It is: (63+57)/2 = 60
66
66
73
It is: 48
It is: 75
All are composite except 61 and 67. Composite numbers: 60, 62, 63, 64, 65, 66, 68, 69, 70
42
There are lots of numbers between 63 and 720. Exactly halfway between them is 391.50, so that may be the answer you are looking for.
Do you mean like what is the number exactly between them. 53+63=116/2=58