So we need to find a number that 2, 3, 4, 5, and 6 go into. A good way to do that is to make a times list for the largest number, and you just wait for a number to appear that all the numbers go into.
(Hint for this one: 2 and 3 will always go into a number that is divisible by 6, so we really only need to think about 6, 5 and 4)
6: 6 12 18 24 30 36 42 48 54 60
The answer is 60 because 60/2=30, 60/3=20, 60/4=15, 60/5=12, and 60/6=10
ANSWER: 60 cookies
I hope this helped, and feel free to ask more questions if you need!!(: