16 men can complete a piece of work in 7 days. In how many days will 28 men complete the same work?

If the ratio of selling price and cost price is 4:5 respectively, then what is the loss percentage?

The monthly salaries of A, B and C are in the ratio 2 : 3 : 5. If C's monthly salary is ₹ 12,000 more than that of A, then B's annual salary is 

A train 200 m long running at 36 kmph takes 55 seconds to cross a bridge. Length of the bridge is

A train passed by a man standing on the platform in 7 seconds and passed by the platform completely in 28 seconds. If the length of the platform is 330 metres, what is the length of the train?

The average age of 30 boys in a class is 15 years. One boy, aged 20 years, left the class, but two new boys came in his place whose age differs by 5 years. If the average age of all the boys now in the class becomes 15 years, the age of the younger newcomer is: 

If the difference between the roots of the equation Ax²+BX+C = 0 is 4, then which of the following is TRUE?

3400 Rupees is divided among A, B, C, D in such a way that the share of A and B, B and C, C and D may be as 2:3, 4:3 and 2:3 respectively. The sum of shares of B and D is: