Quantitative Aptitude

Free Bilingual questions and answers of Quantitative Aptitude

Quantitative Aptitude is an important subject in various government exams, including SSC, Bank, Railway, and UPSC. It is a section that tests the candidate's ability to solve mathematical problems efficiently and accurately. The subject comprises various topics such as arithmetic, algebra, geometry, trigonometry, and data interpretation. Here are some reasons why Quantitative Aptitude is an important subject in government exams:

Importance of Quantitative Aptitude in government exams

  1. Testing of Mathematical Skills: Quantitative Aptitude section tests the candidate's mathematical skills, which are crucial for various job profiles. Candidates are required to solve mathematical problems accurately and efficiently using their mathematical skills.
  2. Enhancing Problem-Solving Skills: The subject of Quantitative Aptitude helps in enhancing problem-solving skills. Candidates are required to analyze complex problems and come up with a logical solution using their problem-solving skills.
  3. Improving Time Management Skills: Quantitative Aptitude section also helps in improving time management skills. Candidates are required to solve mathematical problems within a limited time, which helps in improving their time management skills.
  4. Testing of Analytical Abilities: The section of Quantitative Aptitude also tests the candidate's analytical abilities, which are essential for data analysis and interpretation. Candidates are required to interpret data and solve problems based on their analytical abilities.
  5. Enhancing Accuracy: The section of Quantitative Aptitude helps in enhancing accuracy in mathematical calculations. Candidates are required to solve mathematical problems accurately, which helps in improving their overall accuracy.

In conclusion, Quantitative Aptitude is an essential subject in government exams like SSC, Bank, Railway, and UPSC. It tests the candidate's mathematical skills, problem-solving abilities, time management skills, analytical abilities, and accuracy. Candidates must prepare thoroughly for this subject to increase their chances of selection for the job.

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Q. The average of twelve numbers is 42. The last five numbers have an average of 40 and the first four numbers have an average of 44. The sixth number is 6 less than the fifth number and 5 less than the seventh number. What will be the average of the 5th and 7th numbers?

  • (A). 44
  • (B). 44.5
  • (C). 43
  • (D). 43.5
Option (B) is Correct

Sum of twelve number = $$12 xx 42 = 504$$
Sum of last five numbers = $$5 xx 40 = 200$$
Sum of first four numbers = $$4 xx 44 = 176$$
Sum of 5th, 6th and 7th numbers
$$= 504 – (200 + 176)$$
$$= 504 – 376$$
$$= 128$$
Let 5th, 6th and 7th numbers are $$(x+6), x$$ and $$(x+5)$$. then,
$$x+6+x+x+5 = 128$$
$$3x = 128-11$$
$$x = 117/3 = 39$$
Average of 5th and 7th number
$$= (x+6+x+5)/2$$
$$= (39+39+11)/2$$
= 44.5

2

Q. A man can row at a speed of 15/2 km/hr in still water. If he takes 4 times as long to row a distance upstream as to row the same distance downstream, then the speed of stream (in km/hr) is

  • (A). 4
  • (B). 3.5
  • (C). 4.5
  • (D). 5
Option (C) is Correct

Let the speed of stream be x kmph
∴ Rate upstream = $$15/2-x$$
And rate downstream = $$15/2+x$$
Let’s also assume the time taken in downstream and upstream is 1 hr and 4 hrs respectively.
We know that, Distance = Speed × Time
$$therefore (15/2+x)xx1 = (15/2-x)xx4$$
$$=>15+2x=60-8x$$
$$=>10x=45$$
$$therefore x=9/2=4.5kmph$$

1

Q. A man invests certain amount in Scheme A on Simple Interest for 2 years at certain rate of interest. He invests Rs. 35000 more on Simple Interest for 5 years at twice the rate of interest in Scheme B. The interest received from Scheme B is 10 times of interest from Scheme A. Find the amount that he invests in Scheme B.

  • (A). 65000
  • (B). 70000
  • (C). 35000
  • (D). 40000
Option (B) is Correct

Let the amount invested in scheme A be Rs. $$x$$
Amount invested in scheme B = Rs. $$(x + 35000)$$
Let the rate of interest be R%
According to data provided in the question, we get:
$$10 xx x xx R% xx 2 = (x + 35000) × 2R% × 5$$
⇒ $$2x = x + 35000$$
⇒ $$x = 35000$$
Amount invested in scheme B = Rs. 35000 + 35000 = Rs. 70000
Hence, option B is correct.

0

Q. A person makes a fixed deposit of Rs. 20000 in Bank of India for 3 years. If the rate of interest be 13% SI per annum charged half yearly. What amount will he get after 42 months?

  • (A). 29100
  • (B). 28100
  • (C). 27100
  • (D). 26100
Option (A) is Correct

0

Q. An amount becomes 8028 in 3 years at a fixed percentage interest rate and 12042 in 6 years, when the interest is compounded annually. What is the actual amount?

  • (A). Rs.5352
  • (B). Rs.5235
  • (C). Rs.5253
  • (D). Rs.5325
Option (A) is Correct

Given,
Fixed percentage interest rate,
Amount becomes 8028 in 3 years,
$$12042 = P(1+r/100)^6 …(i)$$
$$8028 = P(1+r/100)^3$$
$$8028^2 = P^2(1+r/100)^6 …(ii)$$
Dividing (ii) by (i), we get
$$P = (8028xx8028)/12042 = 5352$$

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