Seven and tree are both prime numbers, so the only number that goes into both of them is one.
4
3 goes into 7 twice. (2x3=6)
7 and 3
7
1, 3, 7, and 21
It goes 3 times with a remainder of 3
3 AND 5
1
1. 1x3=3 1x7=7
3 times
The number 7. 7 goes into 21 3 times; 7 goes into 49 7 times.
It is: 7*7*7 = 343
252