The answer is 4, 6, 8, 9, and 10. The following numbers (1, 2, 3, 5, and 7) are prime numbers.
The answer will depend how many buttons does the baby have. You just have to add all the buttons together, and that will be your answer.
So 4+3+green buttons =the answer
you find what they both divide by and then divide each one and then you keep doing that until you cant no more
3y = 2x + 6
x + y = 7
y = 7 - x
3(7 - x) = 2x + 6
21 - 3x = 2x + 6
21 - 6 = 2x + 3x
15 = 5x
15/5 = x
3 = x
x + y = 7
3 + y = 7
y = 7 - 3
y = 4
Solution is (3,4)