Question
The average age of a family of 3 members is 36 years. If
the father’s age is 10 years more than the mother’s age, and the age of the son is 4 years less than the mother’s age, what is the age of the Son?Solution
Let the mother's age be x years. Father’s age = x + 10, Son’s age = x - 4. Let the daughter’s age be y years. The average age is given by (x + x + 10 + x - 4 ) / 3 = 36. 3x + 6 = 108 3x = 102 x = 34 Son’s age = x – 4 = 30 years. Hence, the Sonr’s age is 30 years. Correct answer: c) 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
