Tips & Tricks Let, the age of P and Q be measured in terms of ‘a’. Six years ago the ratio of ages of P and Q was 6 : 5. So, six years ago, P was 6a years old and Q was 5a years old. Therefore, present age of P is (6a + 6) and present age of Q is (5a + 6). Four years hence, it will be 11 : 10. According to question: [(6a + 6) + 4]/[(5a + 6) + 4] = 11/10 On solving, we get the value of a is 2. So, the present age of P = (6a + 6) = (6 × 2 + 6) = 18 years. Hence, ‘18’ is the correct answer.