Aptitude and Logical Reasoning Solved Problems:
If 25 is the sum of ages of X, Y and Z and if X is 17 years younger than Z who is thrice as old as Y. Then how old is Z?
Answer : 18
Solution :
Let Y's age be a.
Then Z's age is 3a.
And X's age = 3a-17.
Now, a + 3a + 3a-17 = 25.
7a - 17 = 25.
7a = 25 + 17 = 42
a = 6.
Therefore, Z's age = 3(6) = 18.
If 25 is the sum of ages of X, Y and Z and if X is 17 years younger than Z who is thrice as old as Y. Then how old is Z?
Answer : 18
Solution :
Let Y's age be a.
Then Z's age is 3a.
And X's age = 3a-17.
Now, a + 3a + 3a-17 = 25.
7a - 17 = 25.
7a = 25 + 17 = 42
a = 6.
Therefore, Z's age = 3(6) = 18.
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