For the following questions answer them individually
Amar, Samar and Umesh together can complete a book in 15 days. Amar and Samar rogether can complete the same book in 30 days. Umesh alone can complete the same book in how many days?
Neeraj is 4 times as efficient as Dheeraj and together they complete a work in 44 days. How many days will Neeraj alone take to complete the same work?
The average of a set of 7 numbers is 18. If one number is removed, the average becomes 15. What is the value of the removed number?
When a number is successively decreased by 15 percent, 80 percent and 44 percent, then it becomes 19992. What is that number?
Two boys are standing on the opposite ends of a 540 metres long bridge. If they start walking towards each other at same time at the speed of 18 metres/minute and 12 metres/minute respectively, then in how much time will they meet each other?
If Marked price of an article is Rs. 2500 and selling price is Rs. 1800. What is the discount?
Rs. 7200 is divided among P, Q and R such that 6 times of P's share is equal to 2 times of Q's share which is equal to 3 times of R's share. What is the share of Q?
The difference between the compound interest (compounding annually) and simple interest on a sum at the rate of 30 percent per annum for 2 years is Rs. 5400. What is the sum?