Question
The average of present ages of
Rajesh and his father is 45 years. The age of Rajesh 5 years hence from now will be 1/4 of the present age of his father. Find the present age of Rajesh's father.Solution
ATQ, Sum of present ages of Rajesh and his father = 45×2 = 90 years Let the present age of Rajesh be 'x' years. Then, present age of Rajesh's father = 90−x years. According to the question, (x+5)×4 = (90−x) 4x+20 = 90−x 5x = 70 x = 70/5 = 14 So, present age of Rajesh's father = 90−14 = 76 years.
86 36 ? 7 7.5 0.75
9 49 251 ? 2999 5989
...19 8 ? -14 63 - 36
...90     211     67     236     ?     265
...Select the number from among the given options that can replace the question mark (?) in the following series.
2, 6, 12, 20, ?, ?
(45)2 ÷ ∛729 + (35)2 ÷ 1.4 =?
33Â Â Â 68Â Â Â 103Â Â Â 138Â Â Â 173Â Â Â ?
5, 11, 19, 29, 41, ?
84, 61, 80, 57, 76, ?
If 5,  6,  4,  39,   x,  585,
then, find the value of ((x/2) + 1 + 2x)?
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