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74

Step-by-step Answer
PAGE: 318SET: ExercisesPROBLEM: 74
Please look in your text book for this problem Statement

Express the number as a product of its factors.

The factors of 21:

21 = 1 × 21.

21 = 3 × 7.

Factors of 21 are 1, 3, 7 and 21. Since the number has more than two factors, it is composite.

The number 21 is a composite number.



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