21
0.0307
21
It is: 21
3
1, 3, 7, 21.
21
0.0307
21
It is: 21
Because 3 divides evenly into 21 and 36 with no remainder.
3
1 and 7.
If 21 divides into M then all the factors of 21 must divide into M.The factors of 21 are 1, 3, 7, 21 (we usually avoid the factor 1 and the number)So, 3 and 7 must divide into M.
You just divide it by 21 and if there is no remainder then it went in evenly.
441 divides evenly by these numbers: 1 3 7 9 21 49 63 147 and 441.
1 3 7 9 21 and 63.