The diameter of a circular wheel is 7 m. How many revolutions will it make in travelling 22 km?

• 100

• 400

• 500

• 500

The area of an equilateral triangle is  The length (in m) of the median is

If each edge of a cube is increased by 50%, the percentage increase in surface area is

• 125%

• 50%

• 100%

• 100%

How many tiles, each 4 decimetre square, will be required to cover the floor of a room 8 m long and 6 m broad?

• 200

• 260

• 280

• 280

If the surface areas of two spheres are in the ratio 4 : 9, then the ratio of their volumes will be

• 4 : 9

• 16 : 27

• 8 : 27

• 8 : 27

66.

If x = y = 333 and z = 334, then the values of x³ + y³ + z³ - 3xyz is

• 0

• 667

• 1000

• 1000

If , then x is equal to

• 
• 

• ab + bc + ca

• ab + bc + ca

If (x - a) (x - b) = 1 and a - b + 5 = 0, then the value of  is

• -125

• 1

• 125

• 125

If , then the value of  is

• 0

• -2

• 2

• 2

The value of  is

• 2

• 2²

• 2³

• 2³