When the average age of husband, wife and their son was 42 years, the son got married and a child was born just one year after marriage. When the child turned to be 5 years, the average age of the family becomes 36 years. What was the age of daughter-in-law at the time of marriage?

A pipe of diameter d can drain a certain water tank in 40 minutes. The time taken by a pipe of diameter 2d for doing the same job in: 

Select the number-pair in which the two numbers are related in the same way as are the two numbers of the following number-pair.
24:56

Four words are given in question, out of which only one word is correctly spelt.

Select the option that is related to the third term in the same way as the second term is related to the first term.
Pen : Write :: Knife : __(?)__

Choose the correct meaning of the following Technical / Official terms from the options given below: 

Assets / परिसम्पत्ति