Question
The respective ratio of the present ages of A and B is
2:3. The present age of C is 20% more than that of B. The sum of the present ages of A, B and C is 43 years. What will be the ratio of the ages of A and B after 10 years?Solution
Let the present ages of A and B be 2x years and 3x years, respectively. Therefore, present age of C = 1.20 × 3 = 3.6x years According to the question, 2x + 3x + 3.6x = 43 8.6x = 43 Or, x = 43/8.6 = 5 Therefore, required ratio = (2x + 10):(3x + 10) = 20:25 = 4:5
Find the wrong number in the given number series.
30, 17, 19, 30.5, 64, 164.5
Find the wrong number in the given number series.
0.4, 4, 16, 81, 406, 2031
2824Â Â Â Â 2314Â Â Â Â Â 1973Â Â Â Â 1759Â Â Â Â 1634Â Â Â Â 1574
124, 132, 118, 140, 108, 148
66, 115, 34, 155, 14, 211
1 Â Â Â Â Â Â 3 Â Â Â Â Â Â 7 Â Â Â Â Â Â Â 15 Â Â Â Â Â Â Â 33
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137, 112, 148, 102, 163, 82
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15, 23, 35, 51, 71, 85 Find the wrong number in the given number series.
513, 622, 735, 862, 993, 1139
