Quiz Discussion

Out of the total production of iron from hematite, an ore of Iron, 20% of the ore gets wasted, and out of the remaining iron, only 25% is pure iron. If the pure iron obtained in a year from a mine of hematite was 80,000 kg, then the quantity of hematite mined from that mine in the year is

 

Course Name: Quantitative Aptitude

  • 1] 5,00,000 kg
  • 2] 4,00,000 kg
  • 3] 4,50,000 kg
  • 4] None of these
Solution
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# Quiz
1
Discuss

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

Solution
2
Discuss

80% of a smaller number is 4 less than 40% of a larger number. The larger number is 85 greater than the smaller one. The sum of these two number is

  • 1] 325
  • 2] 425
  • 3] 235
  • 4] 500
Solution
3
Discuss

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
Solution
4
Discuss

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
Solution
5
Discuss

What percentage of numbers from 1 to 70 have 1 or 9 in the unit's digit?

  • 1]

    1

  • 2]

    14

  • 3]

    20

  • 4]

    21

Solution
6
Discuss

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
Solution
7
Discuss

One bacterium splits into eight bacteria of the next generation. But due to environment, only 50% of one generation can produced the next generation. If the seventh generation number is 4096 million, what is the number in first generation?

  • 1] 1 million
  • 2] 2 million
  • 3] 4 million
  • 4] 8 million
  • 5] None of these
Solution
8
Discuss

If a 36 inches long strip cloth shrinks to 33 inches after being washed, how many inches long will the same strip remain after washing if it were 48 inches long?

  • 1] 47 inches
  • 2] 44 inches
  • 3] 45 inches
  • 4] 46 inches
Solution
9
Discuss

The shopkeeper increased the price of a product by 25% so that customer finds difficult to purchase the required amount. But Somehow the customer managed to purchase only 70% of the required amount. What is the net difference in the expenditure on that product ?

  • 1] 55 more
  • 2] 10% more
  • 3] 12.5% less
  • 4] 17.5% less
  • 5] None of these
Solution
10
Discuss

The average weight of a class of students is 67.5 kg. The weight of the class teacher is 25% more than the average weight of the class. The average weight of the class is less than the class teacher by x%. The value of x is:

  • 1] 33.335
  • 2] 25%
  • 3] 20%
  • 4] 22%
Solution
# Quiz