Question
Eight years ago, the ratio of the ages of Chahal and
Rayudu was 5:7. In 16 years, the ratio of their ages will be 11:13. Calculate the average of their current ages.Solution
Let age of Chahal and Rayudu be βCβ and βRβ years, respectively. According to question, (C β 8)/(R β 8) = 5/7 7C β 56 = 5R β 40 7C β 5R = 16β¦β¦β¦β¦β¦β¦β¦β¦(1) And, (C + 16)/(R + 16) = 11/13 13C + 208 = 11R + 176 11R β 13C = 32β¦β¦β¦β¦β¦β¦β¦..(2) Solving equation (1) and (2), we get R = 36 years and C = 28 years Desired Average = (36 + 28)/2 = 32 years
32, 52, 82, 124, 180, ?
9 10 36 333 ? 132825
...A series given below has a missing term (Z), find the value of Z.
3, 10, 36, (Z), 770, 4632
If Z is the first term of another sequence and...
33, ?, 66, 82.5, 99, 115.5
What value should come in the place of (?) in the following number series?
15, 16, 24, 51, 115, ?
81, 83, 87, 95, 111, ?
226, 171, 124, 85, 54, ?
155, 157, 160, ?,Β 172, 183
Find the missing number in the given number series.
8, 9, 16, 11, 32, 13, ?12, 11, 20, 57, 224, 1015