Two successive discounts of 30% followed by 25% are equivalent to a single discount of which of the following?

A boat goes downstream through certain distance in 1 hour and returns back in 1.5 hours. If the current is flowing at the speed of 3 km/hr, what is the speed of the boat in still water?

Mukesh scored 21 runs more than Girish in a cricket match. If the sum of the runs scored by both of them together is 237, what are the runs scored by Girish?

How much water should be added to 30 litre solution of water and alcohol containing 90% alcohol so as to reduce the content of alcohol to 80%?

"B" is 10% heavier than "A" and "C" is 10% lighter than "B". Which of the following statements is TRUE?

Out of 100 students, 50 failed in English and 30 failed in Maths. If 12 students failed in both English and Maths, how many passed in both the subjects?

Which of the following numbers does not fit in the following series? 4, 8, 20, 48, 144, 288, 864

If 200% of a number is 800, what will be 0.5% of that number?

A certain amount of profit is distributed among two business partners A and B in the ratio 3 : 1. If B's investment of Rs. 4,000 is used for first six months only, what is A's investment if it is used for the whole year?