A man can cross 10 miles distance of a river in favor of the stream in 2 hours . He can come back against the stream along the same way in 5 hours . What is the average speed, in miles per hour, for the entire trip ?

On a trip of 200 miles, a man travels at the rate of 40 miles per hour for the first 100 miles. For the rest o...

Three boys have marbles in the ratio of 19:5:3 . If the boy with the least number of marbles has 9 marbles, ho...

Last year I bought 1000 shares of Sunshine Enterprises at TaKa 17.25 per share. Today the stock is quoted at T...

An item is sold for $65.00, giving the retailer a profit of 30% of the cost . What will be the new retail pric...

A manufacturer finds that 0.4% of his production is defective and unsuitable for marketing . How many to 1000...

Six consecutive whole numbers are given ; the sum of the first three numbers is 27. What is the sum of the las...