Question
The age ratio of 'P' and 'Q' 4 years ago was 7:6
respectively. 12 years from now, the ratio of their ages will be 11:10 respectively. What is the present age of 'Q'?Solution
ATQ,
4 years ago, let the age of 'P' and 'Q' be 7x years and 6x years respectively12 years hence,
Age of 'P' = 7x + 4 + 12 = (7x + 16) years
Age of 'Q' = 6x + 4 + 12 = (6x + 16) years
ATQ,
(7x + 16) / (6x + 16) = 11 / 10
⇒ 70x + 160 = 66x + 176
⇒ 4x = 16
⇒ x = 4
So, required age = 6 × 4 + 4 = 28 years
The question below is based on the given series I. The series I satisfy a certain pattern, follow the same pattern in series II and answer the questions...
97, 106, ?, 195, 411, 460
- What will come in place of the question mark (?) in the following series?
712, ?, 576, 508, 440, 372 - What will come in place of (?) in the given number series.
1, 8, 27, ?, 125, 216 24, 35, 57, 90, 134, ?
165      155     135     ?     65      15
...120, 157, 116, 159, ?, 165
What will come in place of the question mark (?) in the following series?
112, 116, 121, ?, 134, 142
32   48   96   ?   720   2520
What will come in place of the question mark (?) in the following series?
17, 81, 131, 169, 197, ?
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