1.

The ratio between the present ages of P and Q is 3 : 4. Four years hence Q will be five years older than P. What is P’s present age? (a) 15 years (b) 20 years (c) 25 years (d) Cannot be determined (e) None of these

Answer»

(a) Let the present ages of P and Q be 3x and 4x respectively.
Then,

(4x + 4) – (3x + 4) = 5
⇒ 4x – 3x = 5
⇒ x = 5
 P’s present age
= 3 × 5 = 15 yrs.



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