If the ratio of cost price and selling price be 10:11, then the profit percentage is

The numbers x, y, z are respectively proportional to 2, 3, 5 and the sum of x, y and z is 80. If the number z is given by the equation z = ax­-8, then a is

The successive discount of 15%, 20% and 25% on an article is equivalent to the single discount of

A is twice as good as B and together they finish a piece of work in 16 days. The number of days taken by A alone to finish the work is

The thymus gland produces a hormone called

Which one of the following substances is normally found in urine?

Which one of the following areas of India is covered by tropical evergreen forest?

In which of the following market forms, a firm does not exercise control over price?