60
(30+60)/2 = 45
59.5
It is: 45
The halfway point between 60 and 90 can be found by calculating the average of the two numbers. To do this, add 60 and 90 together to get 150, then divide by 2 to get 75. Therefore, 75 is the number that is halfway between 60 and 90.
10
The number halfway between 40 and 60 is the average of the two numbers. To find the average, you add the two numbers together and divide by 2. In this case, (40 + 60) / 2 = 50. Therefore, 50 is the number that is halfway between 40 and 60.
The number halfway between 18 and 60 is (18 + 60)/2 = 39.
60
It is: 70
Everything except 1, 2, 5 and 10.
(30+60)/2 = 45
59.5
40
It is: 45
60(40+80)/2 = 60
75