The middle number between 20 and 25 is calculated by finding the average of the two numbers. This is done by adding them together (20 + 25 = 45) and then dividing by 2, resulting in 22.5. Therefore, the middle number is 22.5.
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It is 27.5, the number halfway between the two middle numbers.
The only square number between 20 and 30 is 25.
The only prime n umber between 20 and 25 is 23.
The composite numbers between 20 and 25 are 21, 22, and 24. 23 is the only prime number between 20 and 25.
The number halfway between 15 and 25 can be found by taking the average of the two numbers. To calculate this, add 15 and 25 together to get 40, then divide by 2 to get 20. Therefore, the number halfway between 15 and 25 is 20.