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Is there a general term for divisibility? I.e. A number which is divisible by 5 is called ____. A number which is divisible by 7 is called ____.

15 is divisible by 5. As such it is called ____ or called a ____ number.

there should be a word - maybe one starting with pent ...

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    Composite number: mathsisfun.com/definitions/composite-number.html
    – Hot Licks
    Commented Apr 2, 2020 at 16:57
  • 2
    15 is a multiple of 5. Commented Apr 2, 2020 at 19:00
  • Are you asking because of even and odd numbers?
    – CJ Dennis
    Commented Apr 3, 2020 at 1:10
  • Are you asking if there is a term for numbers divisible specifically by 5, a different term for numbers divisible specifically by 7, etc.?
    – nnnnnn
    Commented Apr 3, 2020 at 1:28
  • 1
    @DecapitatedSoul - You don't have to rely on memory, you can see the full edit history. The original tried to distinguish between numbers divisible by 5 and numbers divisible 7, but it was worded pretty vaguely.
    – nnnnnn
    Commented Apr 4, 2020 at 18:22

1 Answer 1

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Composite number:

A whole number that can be made by multiplying other whole numbers.

Example: 6 can be made by 2 × 3 so is a composite number.

But 7 can not be made by multiplying other whole numbers (1×7 would work, but we said to use other whole numbers) so is not a composite number, it is a prime number.

All whole numbers above 1 are either composite or prime.

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