107
51
3.75 is halfway between.
There are no numbers between 67 and 113 which are multiples of 65.
You can only be halfway between two things.
107
The prime numbers between 101 and 120 inclusive are: 101, 103, 107, 109, 113
51
90 exactly
101 103 107 109 113
101 103 107 109 113
101 103 107 109 113 127 131 137 139 149
Including 101: 101, 103, 107, 109, 113, 127, 131, 137, 139, 149. There are 10.
101 103 107 109 113 127
101 103 107 109 113 127.
They are 101, 103, 107, 109 and 113.
The answer is (27+74)/2 = 101/2 = 50.5