Question
6 years ago from now, ratio of ages of ‘R’ and
‘L’ was 5:7, respectively. If ‘L’ is 6 years elder to ‘R’, then what will be the age of ‘L’, 10 years hence from now?Solution
6 years ago from now, let ages of ‘R’ and ‘L’ be ‘5x’ years and ‘7x’ years, respectively. So, 7x – 5x = 6 Or, 2x = 6 Or, x = 3 Present age of ‘L’ = 7x + 6 = 7 × 3 + 6 = 27 years Age of ‘L’, ten years hence from now = 27 + 10 = 37 years
30, 43, 58, 75, 94, ?
106, 124, 88, 142, ?, 160
Find the missing number in the given number series.
2, 5, 16, 65, 326, ?25, ?, 87, 159, 269, 425Â
What will come in place of the question mark (?) in the following series?
15, 90, 450, ?, 5400, 10800Â
31Â Â Â 40Â Â Â 51Â Â Â 64Â Â Â 79Â Â Â Â ?
7    8     ?     13     17     22    28
...16, 24, 36, ?, 81, 121.5
5, 18, 39, 68, 105, ?
25   25   37.5   ?   328.125   1804.6875
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