51.

• 6

• 5

• 

• 

The lengths of diagonals of a rhombus are 24 cm and 10 cm, the perimeter of the rhombus (in cm) is:

• 52

• 56

• 68

• 72

A dishonest shopkeeper professes to sell goods at his cost price but uses a false weight of 950 gm for each kilogram. His gain percentage is:

• 

• 

• 10%

• 

Ratio of A's age to B's age is 4 : 3. 'A' will be 26 years old after 6 years. The age of B now is:

• 2 years

• 12 years

• 21 years

• 15 years

If the Arithmetic mean of 7, 5, 13, x and 9 is 10, then the value of x is

• 10

• 12

• 14

• 16

A man sells an article at 15% profit. If he had sold it for â‚¹ 6/- more, he would have gained 18%. The main bought the article for

• 100

• 150

• 200

• 250

A' salary was decreased by 50% and subsequently increased by 50%. How much percent does he lose?

• 25%

• 50%

• 

• No loss

A car moving in the morning fog passes a man walking at 4km/h in the same direction. The man can see the car for 3 min and visibility is upto a distance of 130 m. The speed of the car is:

• 

• 

• 7 km/hr

• 5 km/hr

A money lender lends â‚¹ 400/- for 3 years to a person and lends â‚¹ 500/- for 4 years to the other person at the same rate of simple interest. If altogether he receives â‚¹ 160/- as interest, what is the rate of interest per annum?

• 5%

• 7%

• 9%

• 10%

If  then the value of x² + 2x - 1 is

• 

• 4

• 0

• 3