Question
T’s age is 3 times the age of D. 5 years ago, the
ratio of T and D is 4:1. Find the age of P who is 2/3 of T’s age.Solution
Let D’s age be x years. Then, T’s age = 3x years According to question, => (3x – 5)/(x - 5) = 4/1 => 3x - 5 = 4x – 20 => x = 15 T’s age = 3x = 45 years P’s age = 2/3 × 45 = 30 years
612, 487,?, 396, 388, 387
Find the missing number in the given number series.
1, 2, 6, 24, 120, ?What will come in place of the question mark (?) in the following series?
36, 85, ?, 230, 330, 451
Find the missing term in the series:
2, 5, 11, 23, 47, ?
What will come in place of the question mark (?) in the following series?
400, 841, 1202, ?, 1716, 1885
44   45    41   50    ?      59    23
...221, 100, 0, -81, ?
...900 Â Â Â 90Â Â Â 18Â Â Â ? Â Â Â Â 2.16Â Â Â Â 1.08
16, 20, 11, 27, ?, 38
37, 57, 82, ?, 147, 187