What number is halfway between 15 and 20?

Answer 1

17.5

It is 2.5 more than 15 and 2.5 less than 20

To find a halfway point (which is also the average), add the numbers together and divide by 2.

Answer 2

It is (1.5 + 2.0)/2 = 1.75

Answer 3

The number halfway between 15 and 20 is the average of the two numbers. To find the average, you add the two numbers together and divide by 2. In this case, (15 + 20) / 2 = 17.5. Therefore, 17.5 is the number halfway between 15 and 20.

Answer 4

Ah, what a lovely question. To find the number halfway between 15 and 20, we simply add them together and divide by 2. So, 15 + 20 is 35, and when we divide that by 2, we get 17.5. Isn't that just a happy little number right in the middle?

Answer 5

The way to find an average (arithmetic mean) of two or more numbers is simple. Simply use the formula below.

sum of all the terms in a list / number of terms in the list

In the case of -15 and 20...

(-15) + 20 / 2 = 2.5