Data Sufficiency

Is i>j?

1) k^2j>ki
2) j^2k>ji

* A solution will be posted in two days.

There are 3 variables in the original condition (I, j, and k). In order to match the number of variables to the number of equations, we need 3 equations. So there is high chance that E is the correct answer. Using both the condition 1) and the condition 2), the answer is no when k=1, j=10 and i=1. And the answer yes when k=-1, j=-1 and i=10. Hence, the correct answer is E.

- Forget conventional ways of solving math questions. In DS, Variable approach is the easiest and quickest way to find the answer without actually solving the problem. Remember equal number of variables and independent equations ensures a solution.