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Is 4 a multiple of 78?
No, it is a factor. Multiples are always greater than the number itself, factors are smaller.
Explain why 20 is considered to be a composite number?
Any number that has factors smaller than itself (other than 1) is a composite number.Any number that has factors smaller than itself (other than 1) is a composite number.Any number that has factors smaller than itself (other than 1) is a composite number.Any number that has factors smaller than itself (other than 1) is a composite number.
Is 7 a multiple of 48?
No it is not. To be a multiple of a certain number, the first criterion is that the number must be greater than or equal to the number it is a multiple of. Since 7 is smaller than 48, 7 cannot be a multiple of 48.
Why are no prime number a perfect number?
The only factors of a prime are 1 and itself. So, the only factor smaller than the number itself is 1. Therefore the sum of all factors smaller than the number is 1. But 1 is not a prime number. Thus, there is no prime number that is a perfect number.
How is the LCM of two numbers larger than them?
Each of the numbers goes into the LCM so the LCM must be at least as big as the number. So if there are two numbers and their LCM is at least as big as either of them, it cannot be less than either.
