If $$ {\sqrt{4^{n}}=1024}$$, then the value of n is:

The profit percentage of P and Q is same on selling the articles at Rs. 1800 each but A calculates his profit on the selling price while Q calculates it correctly on the cost price which is equal to 20%. What is the difference in their profits?

How many perfect squares lie between 120 and 300? 

A man had a certain amount with him. He spent 20% of that to buy an article and 5% of the remaining on transport. Then he gifted ₹ 120. If he is left with ₹ 1,400, the amount he spent on transport is: 

What is the total surface area and curved surface area of a solid semi circle with radius of 14 cm?

If the volume of two cubes are in the ratio of 343: 512, then what is the ratio of their total surface area?

If   0.8 : X :: 5 : 8, then the value of X is