2 goes into 4. 3 goes into 6 or 9. 5 goes into 10, 15, 20, 25, 30. 7 goes into 14, 21, 28.
1 and 3.
what goes into both 21 and 25
1
The number 7. 7 goes into 21 3 times; 7 goes into 49 7 times.
25
1, 2, 5, 10, 25, 50
What goes in 100 equally
The number is 1.
No integer other than 1 does. Numbers like this are said to be co-prime.
1, 2, 4, 5, 10, 20, 25, 50, 100.
1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 231, 693