Scholastic Aptitude Test - Mathematics - Commercial Mathematics

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Question - 1

The salary of a person was reduced by 10%. By what percent should his reduced salary be raised so as to bring it at par with his original salary?

  • A \(10\frac { 1 }{ 9 } \)%
  • B \(11\frac { 1 }{ 9 } \)%
  • C \(12\frac { 1 }{ 9 } \)%
  • D none of these

Question - 2

When the price of a product was decreased by 10%, the number sold increased by 30% what was the effect on total revenue?

  • A 15%
  • B 16%
  • C 17%
  • D none of these

Question - 3

In the new budget, the price of kerosene oil rose by 25%.By how much percent must a person reduce his consumption so that his expenditure on it does not increase

  • A 10%
  • B 15%
  • C 20%
  • D none of these

Question - 4

The population of a town is 1,76,400. If it increases at the rate of 5%per annum, what will be its population 2 years hence? What was it 2 years ago?

  • A 184481,150000
  • B 194481,160000
  • C 174481,160000
  • D none of these

Question - 5

The value of a machine depreciates at the rate of 10% per annum.If its present value is Rs.1,62,000, what will be its worth after 2 years? What was the value of the machine 2 years ago?

  • A 121220,200000
  • B 131220,200000
  • C 151220,20000
  • D none of these

Question - 6

In an examination,35%oftotal students failed in Hindi, 45%failed in English and 20% in both. Find the percentage of those who passed in both the subjects

  • A 60%
  • B 40%
  • C 50%
  • D none of these

Question - 7

An article is sold at a certain price. By selling it at of\(\frac{2}{3}\) that price one loses 10%. Find the gain percent at original price.

  • A 25%
  • B 30%
  • C 35%
  • D none of these

Question - 8

A man sold two flats for Rs. 6,75,958 each. On one he gains 16%while on the other he loses 16%. How much does he gain or lose in the whole transaction?

  • A 1.56%
  • B 2.56%
  • C 3.26%
  • D none of the above

Question - 9

The price of an article was increased by r%.Later the new price was decreased by r2%. If the latest price was Rs.1, then the original price was

  • A Rs.1
  • B Rs.\(\left( \frac { 1-{ r }^{ 2 } }{ 100 } \right) \)
  • C Rs.\(\frac { \sqrt { 1-{ r }^{ 2 } } }{ 100 } \)
  • D Rs.\(\left( \frac { 10000 }{ 10000-{ r }^{ 2 } } \right) \)

Question - 10

Pure ghee costs Rs.100 per kg. After adulterating it with vegetable oil costing Rs. 50 per kg, a shopkeeper sells the mixture at the rate of Rs. 96 per kg, thereby making a profit of 20%, in what ratio does he mix the two?

  • A 1:2
  • B 2:2
  • C 3:2
  • D none of these
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