Question
The ratio of difference between the present age of A and
B to the present age of B and C is 6:1. 6 years hence, the ratio between the age of A and C is 21:11. If the present age of B is 25% less than the present age of C. find the sum of the present age of A, B, and C?ÂSolution
Let the present age of A, B and C be a, b, and c respectively, As per the question 
                                         x = 4 The present age of A, B, and C are 36 years, 12 years, and 16 years. Sum of A, B, and C = 36+12+16                                 = 64 years
864, 432, 144, ? , 7.2, 1.2
What will come in place of the question mark (?) in the following series?
2.5, 6.5, 18.5, 54.5, 162.5, 486.5, ?
161Â Â Â Â 173Â Â Â Â Â Â 191 Â Â Â Â Â Â 215Â Â Â Â Â Â 245 Â Â Â Â Â Â ?
...What will come in place of the question mark (?) in the following series?
10, 11, 15, 31, 95, ?
What will come in place of (?) question mark in the given number series.
13, 15, 18, 23, 30, ?
What will come in place of the question mark (?) in the following series?
16, 16, ?, 96, 384, 1920
14.8% of 7200 – 16.4% of 6200 + 15.09% of 8100 = 10% of ?
3, 10, 29, 66, ?
?, 32, 75, 144, 245, 384
7, 8, ?, 52, 209, 1046
