Choose the correct answer from the passage:
Most children start watching television long before they enter school. Many doctors have come to the conclusion that children up to the age of two years should not watch TV. The doctors are of the view that the first two years of life are very important for the development of a child’s brain. Spending time with parent and others encourages learning and healthy physical and social development. As children get older, TV can be watched toa limited extent. Children preparing to enter school can learn the alphabets and numbers from educational programme. They can also learn about wildlife on nature shows. Television can be excellent educator as well as entertainer for children.

Both the words ‘educator’ and ‘entertainer’ are 

The percentage of nitrogen present in ammonium sulphate is: 

Find the missing number from the given alternatives.

Pointing towards a boy, a lady said, "he is only son of my father’s wife only daughter”. How is the lady related to boy?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
m_ane_nma_men_eam_an 

A reduction of 20% in the price of rice enables a man to buy 5 kg more for Rs.100. The price of the rice before reduction was-

If (x +y) = 6 and x² + y² = 20 then find the value of (x - y) ².

The average price of 3 precious diamond-studded platinum thrones Rs. 106000000. If their prices are in the ratio 4 : 7 : 9. Find the price of the most expensive diamond?