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Are 1 3 5 and 15 a multiples of 15?
No, they are factors of 15. Factors go into numbers, numbers go into multiples.
Which of the factors of 36 are prime numbers and explain how you know?
2 and 3 are the prime factors of 36. Of the factors of 36, 2 and 3 are the only prime numbers.
What are the multiples that 30 and 36 have in common?
In order to find the common multiples of two numbers you first need to express them as the product of their prime factors: 30 = 2x3x5 36 = 2x2x3x3 The next step is to identify any common factors. In this case, both numbers have a 2 and a 3 as prime factors, so we can discard one of each. Take all the remaining prime factors (2, 2, 3, 3 and 5) and multiply them together to get the LCM: 2x2x3x3x5 = 180. To find other multiples that 30 and 36 have in common, you multiply this number by any integer (2, 3, 4...) Thus the first few common multiples of 30 and 36 are: 180, 360, 540, 720...
What multiples of 2 are not factors of 36?
The factors of 36 are: 1, 2, 3, 4, 6, 9, 12, 18, 36. Thus the multiples of 2 which are not factors of 36 are: 8, 10, 14, 16, 20, 22, 24, 26, 28, 30, 32, 34, 38, 40, 42, ... (all multiples of 2 greater than 36 are not factors of 36).
Describe the numbers that have both 2 and 3 as factors?
Multiples of 6.
