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If the number is even, it is a multiple of 2

If the sum of the digits make a number divisible by 3, the number is a multiple of 3

If the number ends in 5 or 0, the number is a multiple of 5

If the number is divisible by 2 and 3, the number is a multiple of 6

If the sum of the digits make a number divisible by 9, the number is a multiple of 9

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Q: How do you decide if a two digit number is a multiple of a one-digit number?

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Divide the two-digit number by the one-digit number. If the remainder is zero then the 2-digit number is a multiple and if not, it is not.

Divide the 2-digit number by the 1-digit number. If the quotient comes out a whole number, then the big one is a multiple of the small one.

#include <stdio.h> int main(void){ // Local Declerations int intNum; int midDigit; // Statements printf("Enter a 5 digit integral number: "); scanf("%d", &intNum); //the assignment expression below is used to calculate the mid digit oneDigit = (intNum % 1000) / 100; printf("\nThe middle digit is: %d", oneDigit); return 0; }

The digit immediately to the right of your target.

That means that the number has more than one digit.

Without putting too much thought into it, you can just try dividing your two digit number by each and see if you come up with a whole number. One digit numbers you can skip are 0, 1, 4, 6, 8, and 9.

a 3 digit number that is divisible by on is a three digit number that is a multiple of one.

greatest common multiple can be 100 digit number or many digit number.. but the lowest common multiple is 44..

999 is a three-digit multiple of 9

9984 is the largest 4-digit multiple of 32

When a number is a multiple of 5, the possible values of the ones digit are zero and five.

105 is a multiple of 7

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