GRE Exam Numerical Ability Permutation and Combination

If V and W are 2-dimensional subspaces of R^4, what are the possible dimensions of the subspace V Intersection W?
(A) 1 only
(B) 2 only
(C) 0 and 1 only
(D) 0, 1, and 2 only
(E) 0, 1, 2, 3, and 4

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GRE Other Question

Which of the following is an equation of the line tangent to the graph of y = x + e^x at x = 0 ?
(A) y = x
(B) y = x + 1
(C) y = x + 2
(D) y = 2x
(E) y = 2x 1 Let k be the number of real solutions of the equation e^x + x - 2 = 0, in interval (0, 1), and let n be the number of real solution that are not in (0, 1). Which of the following is true.
(A) k = 0 and n = 1
(B) k = 1 and n = 0
(C) k = 1 = n
(D) k > 1
(E) n > 1