51.

A, B and C contract a work for ₹ 440/-. Together A and B are to do  of the work. The share of C should be:

• ₹ 75/-
• ₹ 90/-
• ₹ 100/-
• ₹ 100/-

A dealer makes a washing machine for ₹ 7,500/- and allows a discount of 6% on it. Find the selling price.

• ₹ 6,850/-

• ₹ 7050/-

• ₹ 7250/-

• ₹ 7250/-

The sum of the cubes of two numbers in the ratio 3 : 4 is 5824. The sum of the number is 

• (5824)^1/3

• 28

• 24

• 24

Loss of 20% on selling price is equal to x% loss in cost price. What is x?

• 20

• 25

• 
• 

In a motor of 120 machine parts, 5% parts were defective. In another motor of 80 machine parts, 10% parts were defective. For the two motors considered together, the percentage of defective machine parts were:

• 7%

• 6.5%

• 7.5%

• 7.5%

If (2³)² = 4^x, then 3^x is equal to

• 3

• 6

• 9

• 9

A train, 200 m long is running at a speed of 54 km/hr. The time in seconds that will be taken by train to cross a 175 m long bridge is:

• 12.5

• 20

• 25

• 25

Which of the following ratios can be the ratio of the sides of a right-angled triangle?

• 9 : 6 : 3

• 13 : 12 : 5

• 7 : 6 : 5

• 7 : 6 : 5

Number of circles that can be drawn through the non-collinear points is:

• exactly one

• two

• three

• three

Value of (cos 53° - sin 37°) is

• 0

• 1

• 2sin37°

• 2sin37°