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?
If (5t + 3u) : (5t - 3u) = 5 : 3 then what is the value of t : u?
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?
Calculate: $$2 \times (4 + 6) - 5$$
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?