Question
The current age ratio of P to Q
is 9:13. Six years ago, Q's age was 4 years less than twice P's age at that time. If the average of the present ages of P, Q, and R is 25 years and 4 months, what is R's current age?Solution
ATQ,
Let present age of P and Q be 9a years and 13a years respectively. According to question, (13a – 6) = 2 × (9a – 6) – 4 13a – 6 = 18a – 12 – 4 5a = 10 a = 2 Present age of R = 76 – 44 = 32 years
Choose the missing term.
3F, 6G, 11I, 18L,?
60, 100, 160, 240, ?, 460
1 12 31 58 93 ?
32, 48, 72, 108, ?, 243
36   37    33   42    ?      51    15
...1500 Â Â Â 150Â Â Â 30Â Â Â ? Â Â Â Â 3.6Â Â Â Â 1.8
9 28 83 250 ? 2248
4    9    28    99    ?   2105   12660
...12, 25, 51, ?, 207, 415Â
18    ?    20    13     22     11