Question
A is as much older than V as he is younger than K. In 4
years from now, the ratio of the ages of V and K will be 5:9. Also, in 6 years, A's age will be 30 years. Based on this information, find the sum of the present ages of A and K.Solution
Let A be 'a' years older than V and 'a' years younger than K. Present age of A = 30 - 6 = 24 years So, present age of V = (24 - a) years And, present age of K = (24 + a) years ATQ, (28 - a) /(28 + a) = (5/9) Or, 9 X (28 + a) = 5 X (28 - a) Or, 252 + 9a = 140 - 5a Or, 252 - 140 = 9a + 5a Or, 14a = 112 So, 'a' = 8 Also, the present age of K = (24 + 8) = 32 years Therefore, required sum = 32 + 24 = 56 years
If 6 4 x 5.75 9,
Then, (x²-1) = ?
...3 2 10 ? 17 16
...16, 8, 8, ?, 24, 60
Identify the given logic and complete the series with the correct option. 12, 15, 18, 20,?
?     12     24     44     74     116
...6   16  ?     244  1,245  7,506  52,591
4                14                  130                     512                �...
29    51    95    183    ?     711
1001, 728, 513, 342, 217, ?
6 3.5 2.5 ? 8.5 23.75
...