1 2 4 5 7 10 14 20 28 35 70 140.
Nothing can go evenly into 21 or 17. They are both odd numbers and therefore cannot be evenly divided.
none
The prime factorization of 56 is 2, 2, 2, and 7, so there there are two prime numbers, 2 and 7, that can evenly go into 56.
These numbers go into 634 evenly: 1, 2, 317, 634.
1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140
1 2 4 5 7 10 14 20 28 35 70 140.
The prime factors of 140 are 2, 2, 5, and 7. The prime factors of 124 are 2, 2, and 31. The prime factors of 152 are 2, 2, 2, and 19. The only common factors are 2 and 2. Include 1, and you find that the three numbers that will evenly go into 140, 124, and 152 are 1, 2, and 4.
Not evenly. 125 is an odd number and 2 can only go into even numbers evenly.
Nothing can go evenly into 21 or 17. They are both odd numbers and therefore cannot be evenly divided.
2
none
The prime factorization of 56 is 2, 2, 2, and 7, so there there are two prime numbers, 2 and 7, that can evenly go into 56.
The numbers that go into 30 are1, 2, 3, 5, 30, 15, 10, 6
These numbers go into 634 evenly: 1, 2, 317, 634.
2 and 3, for a start.
These whole numbers go evenly into 64: 1, 2, 4, 8, 16, 32, 64.