In an internal focusing telescope. 

By selling 45 lemons for Rs 40, a man loses 20%. How many should he sell for Rs 24 to gain 20% in the transaction? 

According to I.S.: 456, the number of grades of concrete mixes, is  

Granite is not suitable for ordinary building purpose because 

Assertion (A): Pressure cookers are fitted with ebonite handles. Reason (R): Ebonite is strong.  

Which of the following is not an excavating equipment ? 

What is the altitude of Mt. Machhapuchhre? 

The ratio obtained by dividing 'quick assets' by current liabilities is called