21 and any multiple of 21.
3
3
To find what the factors of a number are you can list the factor pairs: 1 x 21 3 x 7 The factors of 21 are 1, 3, 7, and 21.
21
7 3 x 7 = 21 6 x 7 = 42
8 x 7 = 56, 7 x 3 = 21, so 7
The number(s) that will go into 105 are 1, 3, 5, 7, 15, 21, 35, and 105.
330 is divisible by 3 , 10 and 11.
Well 63 divided by 3 equals 21. So 3 times 21 equals 63. 21 is that number.
That number would have to be 3 times 21 = 63. 1/3 of 3 times anything number is the number itself. So 1/3 of 3 times 21 is 21.
The (LCM) Least Common Multiple of 7 and 3 is 21 because that is the LEAST number that both 3 and 7 go into.
What you do is take a number and see how many times another number goes into it. For example, say you want to divide 21 by 3. How many times does 3 go into 21. Count and see: 3, 6, 9, 12, 15, 18, 21. 7 times. So 21 divided by 3 is 7.