Question
The respective ratio of the present ages of A and B is
7:6. The present age of C is 10% more than that of B. The sum of the present ages of A, B and C is 98 years. What will be the ratio of the ages of A and B after 12 years?Solution
Let the present ages of A and B be 7x years and 6x years, respectively. Therefore, present age of C = 1.1 × 6 = 6.6x years According to the question, 7x + 6x + 6.6x = 98 19.6x = 98 Or, x = 98/19.6 = 5 Therefore, required ratio = (7x + 12):(6x + 12) = 47:42
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4, 7, 12, 21, 36, ?
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 5, 6, 14, 45, 184, ? Â
What will come in place of the question mark (?) in the following series?
4, 8, 2, 12, 1.5, ?
12    48      192      ?      3072       12288
...84, 63, ?, 283.5, 1701
- What will come in place of the question mark (?) in the following series?
24, 35, 57, 90, 134, ? 3, 8, 18, 33, 53, ?
562, 628, 698, ?, 850
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