Factor is also called divisor, a mathematical term. Definition: The quotient (b≠0) of an integer A divided by an integer B is exactly an integer with no remainder, so we say that B is a factor of A .. 0 is not a factor of 0.
What is a multiple: an integer can be divisible by another integer, so this integer is a multiple of another integer.
Multiplication means that an integer can be divisible by another integer, so this integer is a multiple of another integer. For example, 15 can be divisible by 3 or 5, so 15 is a multiple of 3 and 5.
Multiple relations of common numbers
In decimal system, we can judge whether an integer is a multiple of some specific integers by some simple methods.
1. If the number of units is even (0, 2, 4, 6, 8), then this integer is a multiple of 2.
2. If the sum of numbers is a multiple of 3, this integer is a multiple of 3.
3. If the last two digits are multiples of 4 (00, 04, 08 ...), then this integer is multiples of 4.
4. If the ten digits are singular, the single digits are (2,6) or the ten digits are even, and the single digits are (0,4,8), then this integer is a multiple of 4.
5. If the unit number is a multiple of 5 (0,5), then this integer is a multiple of 5.
6. If the sum of numbers is a multiple of 3 and the single digits are even, the integer is a multiple of 6.
7. If the last three digits are multiples of 8, this integer is multiples of 8.
8. If the sum of numbers is a multiple of 9, then this integer is a multiple of 9.
9. If the number of units is 0, this integer is a multiple of 10.
10. If the difference between the sum of odd and even numbers is a multiple of 1 1 (inclusive), then this integer is a multiple of 1 1.
1 1. If the last two digits are multiples of 25 (00, 25, 50, 75), this integer is a multiple of 25.
12. If the last two digits are (00,50), this integer is a multiple of 50.
13. If the last two digits are 00, this integer is a multiple of 100.
Summary:
One factor (a) multiplied by another factor (b) equals a number (c), so we can say that c is a multiple of a and b, and a and b are factors of c.