There are 15 composite numbers from 1 to 25 (including the boundaries):
4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24 and 25
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12 is a composite number - one of 14 such numbers - between 1 and 25.
The number 25 is a composite number. The factors of 25 other than 1 and itself are prime numbers (5 X 5).
25 is not a prime number. It is composite.
25 and 36
There are 1260 composite numbers from 1 to 1500.