Question
Ratio of present ages of P and Q is 2:5. After two years
from now the ratio of ages of P and R will be 5:12. R is one year elder to Q. Find the present age of P.Solution
(P+2) : (R+2) = 5 : 12 P : Q = 2 : 5 => Q = 5P/2 R = Q + 1 => R = 5P/2 + 1 Put equation (ii) in equation (i): (P+2) : (5P/2 + 3) = 5 : 12 => P = 18
35.25 71 146 296 624 1376
...22   39    58    81   ?      141
1 9 64 255 755 1835
...Find the odd one out: 11, 13, 17, 19, 21
32 63 121 ? 453 889
...1,2, 5, ‘?’, 41, 122, 365
7Â Â Â Â Â Â 15Â Â Â Â Â Â Â 31Â Â Â Â Â Â 63Â Â Â Â Â Â 127Â Â Â Â Â Â ?
...122, 116, 125, 119, 128, ?
13, 14, 18, 27, 43, ?
38    40    83    254    ?     5126