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Choose ALL the statements below which correctly describe the numbers 13 and 18 and their factor pairs. □ A....

Choose ALL the statements below which correctly describe the numbers 13 and 18 and their factor pairs.
□ A. The number 13 is prime and has only one factor pair: (1, 13).
□ B. The number 18 is composite and has only one factor pair: (1, 18).
□ C. The number 13 is composite and has factor pairs (1, 13) and others.
□ D. The number 18 is composite and has factor pairs (1, 18), (2, 9), and (3, 6).
□ E. Both numbers are prime and have only one factor pair each.

Answer

A. Correct. The number 13 is prime and has only one factor pair: (1, 13).

B. Incorrect. The number 18 is composite and has more than one factor pair.

C. Incorrect. The number 13 is prime, not composite.

D. Correct. The number 18 is composite and has factor pairs (1, 18), (2, 9), and (3, 6).

E. Incorrect. Only 13 is prime; 18 is composite.

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