Definition. If any number is divisible by another number without a remainder, it is a multiple of that number.
For example, 6 without a remainder is divisible by 3. Therefore, 6 is a multiple of 3.
6 : 3 = 2
Definition. A multiple of a is a number that is divisible without a remainder by a.
This definition contains the variable a. Substitute any number instead of this variable, for example number 5, and read the definition:
A multiple of 5 is a number that is divisible without a remainder by 5.
Any number has infinitely many multiples. For example, the first multiples of 5 are 5, 10, 15, 20, 25. All of them are multiples of 5 because they are divisible by 5 without a remainder:
5 : 5 = 1
10 : 5 = 2
15 : 5 = 3
20 : 5 = 4
25 : 5 = 5
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