Source: Compiled by ALLEN Career Institute

A is as much younger than B and he is older than C. If the sum of the ages of B and C is 50 years, what is definitely the difference between B and A's age?

Age of C < Age of A < Age of B
Given that sum of the ages of B and C is 50 years.
Now we need to find out (B's age - A's age). But this cannot be determined with the given data.

The average age of a husband and his wife was 23 years at the time of their marriage. After five years they have a one year old child. What is the average age of the family?

Total age of husband and wife (at the time of their marriage) = 2 × 23 = 46
Total age of husband and wife after 5 years + Age of the 1 year old child
= 46 + 5 + 5 + 1 = 57
Average age of the family = 57/3 = 19

Veena who is the sister-in-law of Ashok, is the daughter-in-law of Kalyani. Dheeraj is the father of Sudeep who is the only brother of Ashok. How Kalyani is related to Ashok?

Ashok is the only brother of Sudeep and Veena is the sister-in-law of Ashok. Hence Veena is the wife of Sudeep. Kalyani is the mother-in-law of Veena. Kalyani is the mother of Ashok.

A boatman can row 3 km against the stream in 20 minutes and return in 18 minutes. Find the rate of current

Speed upstream =3/(20/60)= 9 km/hr
Speed downstream =3/(18/60)= 10 km/hr
Rate of current =10−9/2 = 1/2 km/hr

1, 3, 4, 8, 15, 27, ?

The sum of any three consecutive terms of the series gives the next term.
So, missing number = 8 + 15 + 27 = 50.

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