Question
The current age of Alex is four times that of Bob. 6
years from now, Alex's age will be three times the age of Charlie at that time. If Bob is 2 years younger than Charlie, determine the current age of Alex.Solution
Let the present age of Bob be ‘b’ years. Thus, the present age of Alex = ‘4b’ years. Let the present age of Charlie be ‘b + 2’ years. ATQ, (4b + 6) = 3 × (b + 2 + 6), Or, 4b + 6 = 3b + 24, Or, 4b – 3b = 24 - 6, Or, b = 18, Therefore, 4b = 72. Therefore, the current age of Alex = 72 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
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