CAT Quant Practice Problems

Question: A, S, M and D are functions of x and y, and they are defined as follows.

A(x, y) = x + y

S(x, y) = x –y

M(x, y) = xy

D(x, y) = \(\frac{x}{y}\), y ≠ 0 y

What is the value of S[M(D(A(a, b), 2), D(A(a, b), 2)), M(D(S(a, b), 2), D(S(a, b), 2))]?


  1. a2+ b2
  2. ab
  3. a2– b2
  4. \(\frac{{\rm{a}}}{{\rm{b}}}\)

Correct Option:2

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