There are countless multiples of 7. A multiple of 7 is characterized in that if the single digit of an integer is truncated, the remaining number is subtracted by twice the single digit. If the difference is a multiple of 7, the original number can be divisible by 7.
Multiplier algorithm: the product obtained by multiplying this number by any positive integer is the multiple of this number.
For example, 7× 1=7, and 7 is a multiple of 7, that is, 1 is a multiple of 7.
7×5=35, 35 is a multiple of 7, and 7 is a multiple of 5.
Extended data:
Characteristics of common numerical multiples:
Characteristics of multiples of (1) number 2:
At the end of a number is an even number (0, 2, 4, 6, 8), which is a multiple of 2.
(2) Characteristics of multiples of the number 3:
The sum of the digits of a number is a multiple of 3, and this number is a multiple of 3.
(3) Characteristics of multiples of the number 4:
The last two digits of a number are multiples of 4, and this number is multiples of 4.
(4) Characteristics of multiples of the number 5:
The end of a number is 0 or 5, which is a multiple of 5.
(5) Characteristics of multiples of the number 6:
As long as a number is divisible by 2 and 3, it is divisible by 6.