Question
A’s age is the fifth part of his father’s
age. After 7 years, the age of A’s father will be twice the age of B. If B’s 6th birthday is celebrated 3 years ago, then what is the current age of A?Solution
Let A’s age be x years and father’s age be 5x years. Present age of B = 6 + 3 = 9 years After 7 years, => 5x + 7 = 2(9 + 7) => 5x = 32 – 7 => x = 25/5 = 5 years
168, 164, 155, 139, ?, 78
1221,     1100,     1000,     919,       ?
...196, 196, 203, 229, 292, ?
Find the missing number in the given number series.
1, 2, 3, 6, 11, 20, ?What will come in place of the question mark (?) in the following series?
10, 11, 15, 31, 95, ?
120, 120, ?, 360, 900, 2700
290, 571, 900, ?, 1485, 1890
- What will come in place of the question mark (?) in the following series?
-5, -2, ?, 10, 19, 30 654, 647, 633, 612, 584, ?
10Â Â Â 11Â Â Â Â 12Â Â Â Â 20Â Â Â Â 24Â Â Â Â ?