Question
The ratio of age of A and his son is 10:3. If the
difference of their ages 8 year ago is 28, then find the sum of ages of A and his son 12 year hence.Solution
Let the present age of Raman and his son be 10x and 3x respectively. => 10x – 3x = 28 ∴  x = 4 Required sum = 13 × 4 + 24 = 76 years
A-5,  A,  35,  52, 78, 115
30, 42, 48, 54, 65, 81, 126
- Find the wrong number in the given number series.
25, 34, 18, 34, 9, 46 Find the wrong number in the given number series.
32, 48, 72, 108, 162, 245
Find the wrong number in the given number series.
1600, 800, 1200, 400, 100 , 12.5
547, 594, 640, 691, 741, 792
Find the wrong number in the given number series.
26, 38, 60, 110, 206, 398
75, 450, 225, 1330, 675, 4050
Find the wrong number in the given number series.
8, 12, 23, 40, 66, 103
62, 79, 98, 119, 142, 165