Hey!
Hope this helps....
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For Question 2: 6+3+n=12
This is because we know that there is a combined total of 12, so it has to equal 12 (which cancels out C), we also know that the question is not saying anything that implys that we are multiply anything thing (which cancels out B, and D), so we are only left with A.) 6+3+n=12
For Question 4: 2 (Fraction 2 over 3)
This is because when we substitute all those choices in for y, we get...
2/(3*(3/8)) ~ 1.77778
2/(3*(5/12)) = 1.6
2/(3*(11/12)) ~ 0.727273
2/(3*(8/3)) = 0.25
^^^^ I got 8/3 from A (b/c) > ((A*c)+b)/c
(And we know 1/4 = 0.25)