21 and 28 are composite.
It is: 49-28 = 21
28 is a composite number because it has factors of 2 and 7.
22, 24, 25, 26, 28
38 - 17 = 21 / 2 = 10.5 so the number in the middle is 17 + 11 = 28
No, 28 is a Composite Number.
composite and 2*2*7 = 28
20 21 22 24 25 26 27 28 30
Nine: 18, 20, 21, 22, 24, 25, 26, 27, 28
The composite factors of 28 are 4, 14, 28 The composite factors of 24 are 4, 6, 8, 12, 24
28 is a composite number because it has more than two factors but 29 is a prime number because it has only two factors.
The composite numbers between 21 and 31 are: 21 22 24 25 26 27 28 30
We know that 28 is a composite number because:It is an even numberIt is divisible by more than 2 numbers