You just divide it by 21 and if there is no remainder then it went in evenly.
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If it divides evenly into the original number with no remainder, it's a factor.
Because 3 divides evenly into 27 with no remainder.
A regular polygon will tessellate if its interior angle divides 360 evenly.
add up all of the numbers together and if the sum is divisible by 3 then so is the original number.example:333+3=99/3=333/3=11JANE BROWN
When the first number can divide the second without remainder. The formal definition would be as follows: For integers x and y, x is a factor of y if there exists an integer n such that y = n*x
Divide the smaller number into the larger number. If it comes out evenly with no remainder, the larger number is a multiple of the smaller number. All even numbers are multiples of two.
3 is a factor of 21 and it is not a multiple of 7.
A multiple of 9 is any number that can be evenly divided by 9, such as 18, 27, 36, etc. A factor of 9 is a number that divides evenly into 9 without leaving a remainder, such as 1, 3, or 9 itself. Therefore, the only multiple of 9 that is also a factor of 9 is 9 itself.
you know that nineteen is a prime number because it only divides by one and itself. hopefully that helped
you know that nineteen is a Prime number because it only divides by one and itself. hopefully that helped
You know that it is a multiple of 9 if it divides into 9 equally.
If its not divisible by 2 evenly then it is an odd number.