1, 3, 7, 21.
The number 7. 7 goes into 21 3 times; 7 goes into 49 7 times.
1, 3, 7, 21.
1, 3, 7, and 21
1, 3, 7, 21.
1, 3, 7 and 21
7 and 3
1 and 7.
When figuring out what number goes both into 21 and 28, you should look at the factor paris. 21: 1 x 21, 3 x 7 28: 1, 28, 2 x 14, 4 x 7 7 goes into both 21 and 28.
1 and 7
7
The numbers that go into 21 evenly are 1, 3, 7, 21.