Q: If 0 < a < b < 1 which of the following is (are) true I- a-b is negative II- 1/ab is positive III- 1/b-1/a is positive
Q: A boat travels at the speed of 25 km/h upstream and 35 km/h downstream. Find the speed of water.
Q: A can complete a piece of work in 16 days and B can complete it in 20 days. They start working together. Two days before the completion of the work A leaves. Work is completed in
Q: A garrison has provisions for 40 days. At the end of 5 days half of the men left the garrison. How long the food will last for?
Q: How many numbers are there in four digit no whose all digits are prime.