Quiz Discussion

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

The population of a city is 35000. On an increase of 6% in the number of men and an increase of 4% in the number of women, the population would become 36760. What was the number of women initially?

• 1] 18000
• 2] 19000
• 3] 17000
• 4] 20000

The difference between a number and its two-fifth is 510. What is 10% of that number ?

• 1]

  75

• 2]

  85

• 3]

  95

• 4]

  105

If two numbers are respectively 30% and 40% more than a third number, what percent is the first of the second?

• 1]

  %

• 2]

  %

• 3]

  80%

• 4]

  75%

Rajeev buys good worth Rs. 6650. He gets a rebate of 6% on it. After getting the rebate, he pays sales tax @ 10%. Find the amount he will have to pay for the goods.

• 1]

  Rs. 6876.10

• 2]

  Rs. 6999.20

• 3]

  Rs. 6654

• 4]

  Rs. 7000

Vicky's salary is 75% more than Ashu's. Vicky got a raise of 40% on his salary while Ashu got a raise of 25% on his salary. By what percent is Vicky's salary more than Ashu's?

• 1] 96%
• 2] 51.1%
• 3] 90%
• 4] 52.1%

A student appeared in the Mock CAT. The test paper contained 3 sections namely QA, DI and VA. The percentage marks in all VA was equal to the average of percentage marks in all the 3 sections. Coincidentally, if we reverse the digit of the percentage marks of QA we get the percentage marks of DI. The percentage marks in VA scored by student could be:

• 1] 81
• 2] 48
• 3] 66
• 4] 69
• 5] None of these

25% of 25% Is Equal To

• 1]

  0.0625

• 2]

  0.0210

• 3]

  0.03145

• 4]

  0.3210

The cost of a car is 400% greater than the cost of a bike. If there is an increase in the cost of the car is 15% and that of bike 20%. Then the total increase in the cost of the 5 cars and 10 bikes is:

• 1]

  17.5%

• 2]

  %

• 3]

  18.5%

• 4]

  18.25%

The price of a car depreciates in the first year by 25% in the second year by 20% in third year by 15% and so on. The final price of the car after 3 years, if the present cost of the car is Rs. 10,00,000 :

• 1] 7,80,000
• 2] 1,70,000
• 3] 6,90,000
• 4] 5,10,000