The marked price of a radio set is ₹ 480. The shopkeeper allows a discount of 10% and gain 8%. If no discount is allowed, his gain per cent would be

• 18%

• 18.5%

• 20%

• 25%

The prices of a school bag and a shoe are in the ratio 7 : 5. The price of a school bag is ₹ 200 more than the price of a shoe. Then, the price of a shoe is

• ₹ 700

• ₹ 500

• ₹ 1200

• ₹ 200

A sum of ₹ 300 is divided among P, Q and R in such a way that Q gets ₹ 30 more than P and R gets ₹ 60 more than Q. The ratio of their shares is

• 2 : 3 : 5

• 3 : 2 : 5

• 2 :  5 : 3

• 5 : 3 : 2

The average of nine numbers is 50. The average of the first five numbers is 54 and that of the last three number is 52. Then, the sixth number is

• 34

• 24

• 44

• 39

The average of the first nine integral multiples of 3 is

• 12

• 15

• 18

• 21

An article is sold for ₹ 300 at a profit of 20%. Had it been sold for ₹ 235, the loss of percentage would have been

• 3

• 5

• 6

• 16

117.

A box has 100 blue balls, 50 red balls and 50 black balls. 25% of blue balls and 50% of red balls are taken away. Then, percentage of black balls at present is

• 25%

• 

• 40%

• 50%

Two cars are moving with speeds v₁ and v₂ towards a crossing along two roads. If their distances from the crossing be 40 m and 50 m at an instant of time, then they do not collide, if their speeds are such that

• v₁ : v₂ ≠  4 : 5

• v₁ : v₂ ≠  5 : 4

• v₁ : v₂ ≠  25 : 16

• v₁ : v₂ ≠  16 : 25

A certain distance is covered at a certain speed. If half of this distance is covered in double the time, the ratio of the two speeds is

• 4 : 1

• 1 : 4

• 2 : 1

• 1 : 2

The simple interest on ₹ 4000 in 3 yr at the rate of x% per annum equals to the simple interest on ₹ 5000 at the rate of 12% per annum in 2 yr. The value of x is

• 6%

• 8%

• 9%

• 10%