1 and 2 are factors of both numbers
The number is 1.
The number 4 goes into the number 25 6 times, with 1 left over.
one
The only common factor of 9, 6 and 4 is 1.
well, no number goes int 5 or 7 that can also go into 8 or 4.
because it goes 2 4 6 8
One.
210 is the number which is completely divisible by all of these numbers but not 4.
3 or 0
1, 2, 3, 4, 6, 12
2 and 1