Mohan, a shopkeeper, bought a shirt of list price ₹225 at a discount of 20%. If he wants a profit of 30% then he should sell the shirt for:

A vessel contain some litres of pure milk. If 25 litre of water is added to the vessel, then ratio between milk and water becomes 12:5, 17 litres of mixture is drawn from the vessel and 10 litre of water is added to the mixture. Find the new ratio between milk and water. 

What should come place of the question mark(?) in the following number series?
17, 18 , 26, 53 , 117, ? , 458

In a village, 70 % registered voters cast their votes in the election. Only two candidates (A and B) contested the election. A won the election by 400 votes. Had A received 12.5 % less votes, the result would have been tie. How many registered voters are there in the village? 

In how many ways can a committee schedule three speakers for three different meetings if they are all available on any of five possible dates?

In the given figure, ABC is an equilateral triangle. Two circles of radius 4 cm and 12 cm are inscribed in the triangle. What is the side (in cm) of an equilateral triangle?