It is: (12+42)/2 = 27
Thirty 42 - 18 = 24 24 / 2 = 12 18 + 12 = 30 42 - 12 = 30
Thirty 42 - 18 = 24 24 / 2 = 12 18 + 12 = 30 42 - 12 = 30
A number that has exactly an odd number of factors is a power of another number. A number between 10 and 30 that is a power is 16. It is 24 (as well as 42) and its factors are 1, 2, 4, 8, and 16.
32 = 9 42 = 16 12 lies between 9 and 16, so √12 lies between 3 and 4.
It is 42, exactly as in the question.
Many ways, but the simplest is add the two numbers together and divide the answer by 2. For example, number between 23 and 42. Add them together: 23 + 42 = 65 Divide by 2: 65/2 = 32.5 So 32.5 is [exactly halfway] between 23 and 42.
42 is exactly halfway between 32 and 52.42
3.5
78
It is: 84
Half way between 36 and 42 is (36 + 42) ÷ 2 = 39.
Halfway between 42 and 82 is (42 + 82) ÷ 2 = 124 ÷ 2 = 62.