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 number which exceeds 16% of it by 42 is :

• 1]

  50

• 2]

  52

• 3]

  58

• 4]

  60

• 5]

  None Of These

Gauri went to the stationers and bought things worth Rs. 25, out of which 30 paise went on sales tax on taxable purchases. If the tax rate was 6%, then what was the cost of the tax free items?

• 1]

  Rs. 15

• 2]

  Rs. 15.70

• 3]

  Rs. 19.70

• 4]

  Rs. 20

In an office in Singapore there are 60% female employees. 50 % of all the male employees are computer literate. If there are total 62% employees computer literate out of total 1600 employees, then the no. of female employees who are computer literate ?

• 1] 690
• 2] 674
• 3] 672
• 4] 960

What is 15 percent of Rs. 34.? 

• 1]

  Rs 3.40

• 2]

  Rs 3.75

• 3]

  Rs 4.5

• 4]

  Rs 5.1

If A's salary is 25% more than B's salary, then B's salary is how much lower than A's salary?

• 1]

   %

• 2]

  25%

• 3]

  20%

• 4]

  

A fraction in reduced form is such that when it is squared and then its numerator is reduced by 33 1/3 % and denominator is reduced to 20%, its result is twice the original fraction. The sum of numerator and denominator is:

• 1] 8
• 2] 13
• 3] 17
• 4] 15
• 5] None of these

A shepherd had n goats in the year 2000. In 2001 the no. of goats increased by 40%. In 2002 the no. of goats declined to 70%. In 2003 the no. of goats grew up 30%. In 2004, he sold 10% goats and then he had only 34,398 goats. The percentage increase of the no. of goats in this duration was :

• 1] 16.66%
• 2] 14.66%
• 3] 11.33%
• 4] 20%

220% of a number X is 44. What is 44% of X.

• 1] 8.8
• 2] 8.9
• 3] 6.6
• 4] 7.7

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