Quiz Discussion

express 62.5% as a fraction

• 1]

  1/2

• 2]

  5/8

• 3]

  3/8

• 4]

  7/8

The price of Maruti car rises by 30 percent while the sales of the car come down by 20%. What is the percentage change in the total revenue?

• 1] - 4%
• 2] - 2%
• 3] + 4%
• 4] + 2%
• 5] None of these

Half percent, written as a decimal, is

• 1] 0.2
• 2] 0.02
• 3] 0.005
• 4] 0.05

25% of 25% Is Equal To

• 1]

  0.0625

• 2]

  0.0210

• 3]

  0.03145

• 4]

  0.3210

Every month a man consumes 25 kg rice and 9 kg wheat. The price of rice is 20% of the price of wheat and thus he spends total Rs. 350 on the rice and wheat per month. If the price of wheat is increased by 20% then what is the percentage reduction of rice consumption for the same expenditure of Rs. 350? Given that the price of rice and consumption of wheat is constant :

• 1] 40%
• 2] 25%
• 3] 36%
• 4] 24%
• 5] Cannot determined

An ore contains 25% of an alloy that has 90% iron. Other than this, in the remaining 75% of the ore, there is no iron. How many kilograms of the ore are needed to obtain 60 kg of pure iron?

• 1] 250 kg
• 2] 275 kg
• 3] 300 kg
• 4] 266.66 kg

A company has 12 machines of equal efficiency in its factory. The annual manufacturing expenses are Rs. 24,000 and the establishment charges are Rs. 10,000. The annual output of the company is Rs. 48,000. The annual output and manufacturing costs are directly proportional to the no. of machines while the share holders get the 10% profit, which is directly proportional to the annual output of the company. If 8.33% of machines remained close throughout the year. Then the percentage decrease in the amount of share holders is :

• 1] 14.28%
• 2] 11.11%
• 3] 16.66%
• 4] 8.33%
• 5] None of these

In an examination 80% candidates passed in English and 85% candidates passed in Mathematics. If 73% candidates passed in both these subjects, then what per cent of candidates failed in both the subjects?

• 1] 8
• 2] 15
• 3] 27
• 4] 35

In an institute, 60% of the students are boys and the rest are girls. Further 15% of the boys and 7.5% of the girls are getting a fee waiver. If the number of those getting a fee waiver is 90, find the total number of students getting 50% concessions if it is given that 50% of those not getting a fee waiver are eligible to get half fee concession?

• 1] 360
• 2] 280
• 3] 320
• 4] 330
• 5] 350

In a laboratory experiment, a sample of air which is a mixture of oxygen and water vapour is taken. Water vapour, contains hydrogen and oxygen gases. If air contains a total of 70% oxygen (including that contained in the water vapour) by weight while water vapour contains 16.66% of oxygen by weight, how many kilograms of water vapour is present in 1 kilogram of air?

• 1]

  0.20

• 2]

  0.36

• 3]

  0.32

• 4]

  0.25