As 8 is even, and 3 is odd, I think only 1 can go into both.
Chat with our AI personalities
The number that both 7 and 8 can go into evenly is 56.
It is: 200
3*(n + 8) = 21 Divide both sides by 3: n + 8 = 21/3 = 7 Substract 8 from both sides: n = 7 - 8 = -1
all you have to do is find a number (not one) that will go into 6 and 8. 2 goes into both of them, so it would be 3:4.
The only number that goes into both 8 and 45 is 1