Question : Directions: P is 4 years older than Q. Q is 7 years younger than R. R is 5 years older than S. S is 8 years younger than T. Who is the youngest?
Option 1: P
Option 2: Q
Option 3: R
Option 4: S
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Correct Answer: Q
Solution : Given: P = Q + 4; Q = R – 7; R = S + 5; S = T – 8
Let the age of T be a. Age of S = T – 8 = a – 8 Age of R = S + 5 = a – 8 + 5 = a – 3 Age of Q = R – 7 = a – 3 – 7 = a – 10 Age of P = Q + 4 = a – 10 + 4 = a – 6 Thus, the arrangement is as follows – T > R > P > S > Q
So, Q is the youngest. Hence, the second option is correct.
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