I have a couple questions that I know the solutions to, but I can't for the life of me figure out the process involved at arriving at those solutions...

1) If 18*sqrt(18) = r*sqrt(t), where t and r are positive integers and r > t, which of the following could be the value of r*t? (solution is 108)

2) The eggs in a certain basket are either white or brown. If the ration of the number of white egges to the number of brown eggs is (2/3), each of the following could be the number of eggs in the basket EXCEPT:

a) 10

b) 12 (this is the answer)

c) 15

d) 30

e) 60

I thought about proportionalities with problem 1 and got no where, and with problem 2 I thought I had it nailed until I checked the answer.

As always, any advice is greatly appreciated