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99 = 3 x 3 x 11. For any number up to 100, you can quickly determine whether it is composite by trying to divide by 2, 3, 5, and 7. For larger numbers, you may need to test more factors, up to the square root of the number.

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Q: Is ninety nine a composite or prime?

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prime

A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite. 98 is composite.

Nine is composite. The factors of 9 are: 1 3 9

Nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine

Related questions

99 (Ninety nine) is composite, because it can be multiplied by 11, and 1.

Prime

Yes.

It is composite.

Ninety-seven is a prime; the remainder of the nineties are composites.

It is prime.

prime

Ninety is a composite number. Ninety is a composite number.

Thirty-nine is NOT a prime number. It is composite.

39 is composite.

Composite.

A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite. 98 is composite.