Question
Rishav's current age is 25% more than Sourav's current
age. In 8 years, the ratio of their ages will be 5:6. What will be Rishav's age 10 years from now?Solution
Let the present age of Sourav is x years. Therefore, present age of Rishav is x + 0.25x = 1.25x years According to the question, (x + 8): (1.25x + 8) = 5:6 Or, 6x + 48 = 6.25x + 40 Or, 0.25x = 8 Or, x = 32 years Therefore, present age of Rishav = 1.25x = 1.25 × 32 = 40 years Age of Rishav after 10 years = 40 + 10 = 50 years
15   8   9   15   32    ?    250.5
80    81.5    83.5     ?     89      92.5
...8      27       64      125     ?       343Â
...18, 21, 45, 138, 555, ?
135, 148, ?, 184, 207, 236
33Â Â Â 41Â Â Â 25Â Â Â 49Â Â Â 17Â Â Â Â ?
25   25   37.5   ?   328.125   1804.6875
120, 130, 145, 165, ?, 220
11    16    42    141    ?   2945   17700
...80, 116, 52, ?, 8, 204