51.

If the sum of a number and its reciprocal be 2, then the number is

• 0

• 1

• -1

• -1

The area of a rectangle is 60 cm² and its perimeter is 34 cm, then the length of the diagonal is

• 17 cm

• 11 cm

• 15 cm

• 15 cm

A cloth merchant has announced 25% rebate in prices. If one needs to have a rebate of ₹ 40/-, then how many metres of cloth costing ₹ 32 per metre he should purchase?

• 6 m

• 5 m

• 10 m

• 10 m

A profit of Rs 960 is divided between A and B in the ratio  The difference of their profit is

• ₹ 120/-

• ₹ 160/-

• ₹ 180 /- 

• ₹ 180 /- 

The average monthly salary of 19 members of a group is ₹ 16000/-. If one more members whose monthly salary is ₹ 20000/- has joined the group, then the average salary of the group is

• ₹ 18,250

• ₹ 16,200

• ₹ 18,000

• ₹ 18,000

A T.V was sold at a profit of 5% If it had been sold at a profit of 10%, the profit would have been ₹ 1000/- more. What is its cost price?

• ₹ 20,000

• ₹ 5,000

• ₹ 10,000

• ₹ 10,000

The price of an article is decreased by 10%. To restore it to its former value, the new price must be increased by

• 

• 10%

• 11%

• 11%

A moving train passes a platform 50 m long in 14 sec and a lamp post in 10 sec. The speed of the train (in km/h) is

• 24

• 36

• 40

• 40

If  then the value of  is

• -2

• 0

• 1

• 1

If then the value of  is equal to

• 1

• 2

• 3

• 3