The number 25 is a composite number. The factors of 25 other than 1 and itself are prime numbers (5 X 5).
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25 and 54 are composite.
Of those, 5 is not composite.
The composite numbers between 20 and 25 are 21, 22, and 24. 23 is the only prime number between 20 and 25.
25 is the only composite number out of 31, 29, 25, 23.
12 is a composite number - one of 14 such numbers - between 1 and 25.