CAT Quant Practice Problems

Question: Let a = p and b = q, where p and q are positive quantities.

Define \(\begin{array}{l}{a_n} = p{b_{n - 1}},{\rm{ }}{{\rm{b}}_n} = q{b_{n - 1}},{\rm{ \;for\; even \;}}n > 1\\and{\;\rm{ }}{a_n} = p{a_{n - 1}},{b_n} = q{a_{n - 1}},{\rm{ for\;odd\;n>1?}}\end{array}\)

Which of the following best describes \({a_n} + {b_n}\) for even ‘n’?


  1. 7
  2. 13
  3. 11
  4. 9
  5. 15

Correct Option:4

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CAT Quant Practice Problems
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