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.
54, 58, 67, 92, 173, 262Â
Find the wrong number in the given number series.
7, 8, 17, 42, 83, 172Find the wrong number in the given number series.
28, 40, 63, 98, 147, 224
599, 631.9, 667.5, 707.5, 751.6, 800, 852.9
Find the wrong number in the given number series.
6, 24, 120, 720, 5041, 40320
24, 41, 58, 75, 94, 109
13, 24, 69, 272, 1355, 8248
Find the wrong number in the given number series.
934, 885, 949, 868, 968, 849Â
5, 6, 8, 16, 38, 158
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