What is liberated when the base is dissolved in water?

There are some coins and rings of either gold or silver in a box. 60% of the objects are coins, 40% of the rings are of gold and 30% of the coins are silver. What is the percentage of gold articles?

In the sentence identify the segment which contains the grammatical error.

The promoters of Med Hospitals has agreed to sell their business to Pal Hospitals.

Pratip started the business by investing some money. After some time, Sheela shared double by investing double the money. At the end of the year, the profit was distributed in such a way that 7 times the profit of Pratip was equal to 6 times the profit of Sheela, then after how many months did Sheela join the business.

What is the ancient name of Iraq?

In world , Rajasthan is situated in which hemisphere? 

In the following question, select the missing number from the given responses.