Select the option that will improve the underlined part of the given sentence. In case no improvement is needed, select ‘No improvement required’.
 My mother’s sister work since eight hours every weekday. 

Select the option that will improve the underlined part of the given sentence. In case no improvement is needed, select 'No improvement required'.
 Major hubs of the information technology industry is the Silicon Valley of Central California. 

Select the most appropriate synonym of the given word.
 Grieve 

Parts of the following sentence have been given as options. One of them may contain an error. Select the part that contains the error from the given options. If you don’t find any error, mark ‘No error’ as your answer.
 Elizabeth beat her rival with the gold medal in the 2021 summer Olympics. 

The value of $$3{2\over7}+14{4\over9}+5{3\over9}$$ is:

A work can be completed by 20 men in 50 days. 30 more men join them after 10 days of work. How many days will be saved in completion of the work?

On a certain sum of money, the simple interest for 2 years is ₹150 at the rate of 10% per annum. What is the difference between the compound interest and the simple interest for 2 years if, in the case of compound interest, interest is compounded annually at the rate of 10% per annum.

8 years ago, the average age of Rahul's family consisting of 6 members was 35 years. One year ago a new baby was born in this family. What will be the average age of the family four years hence?