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Are 15 and 33 prime numbers?
No, they are composite numbers. The factors of 15 are 1, 3, 5, and 15. The factors of 33 are 1, 3, 11, and 33. Prime numbers have two factors: 1 and the number itself, so 15 and 33 cannot be prime.
What is the meaning of factors in math terms?
Factors are numbers that, when multiplied together, equal a number. For example, the factors of 6 are 1, 2, and 3. When these numbers (1, 2, 3) are multiplied together, they equal 6.
Are 1 3 5 and 15 a multiples of 15?
No, they are factors of 15. Factors go into numbers, numbers go into multiples.
Is 39 a composite?
Yes. Composite numbers have more than exactly two factors; 39 has four factors: 1, 3, 13, 39. Prime numbers have exactly two factors, eg 3 has the two factors 1 and 3. Square numbers have an odd number of factors, eg 36 has nine factors: 1, 2, 3, 4, 6, 9, 12, 18, 36. The number 1 is not prime as it only has one factor: 1.
Do negative numbers have factors?
Yes, the factors for -15 are: 1, -15 3, -5 5, -3 15, -1 OR 1, 3, 5, 15, -1, -3, -5, -15
