QUESTION

CSAT

Medium

Reasoning

Prelims 2015

How many logically possible orders of the six cousins (A, B, C, D, E, and F) can be formed in increasing order of age?

Select an option to attempt

Explanation

Cousins' Ages: $E = 22$ (oldest) Youngest = 17

Relative Age Relationships: $A > B$ $C > D$ $B < F < D$ $A = C + 1$

Deduce Ages: Possible ages: 17, 18, 19, 20, 21, 22 $E = 22$ (fixed as oldest) The youngest is 17.

Conditions to satisfy: A is older than B C is older than D F's age is between B and D A is one year older than C

Possible Combinations: 2

Order 1 17: B 18: C 19: A 20: D 21: F 22: E

Order 2: 17: D 18: C 19: A 20: B 21: F 22: E

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