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 in

• 20 days

• 21 days

• 22 days

• 24 days

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

• 60%

• 47%

• 49%

• 40%

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

• 6

• 

• 3

• 

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

• 1%

• 10%

• 5%

• 8%

The price of rice has increased by 60%. In order to restore the original price, the new price must be reduced by:

• 

• 

• 40%

• 45%

A man covers a total distance of 100 km on bicycle. For the first 2 hours, the speed was 20 km/hr and for the rest of the journey, it came down to 10 km/hr. The average speed will be

• 

• 13 km/hr

• 

• 20 km/hr

Alipta got some amount of money from her father. In how many years will the ratio of the money and the interest obtained from it be 10 : 3 at 6% simple interest per annum?

• 7 years

• 3 years

• 5 years

• 4 years

58.

If (x - 2) (x - p) = x² - ax + 6, then the value of (a - p) is:

• 0

• 1

• 2

• 3

When  then value of  is

In a triangle ABC, if  and , then  is equal to

• 80°

• 40°

• 60°

• 20°