tricks to solve quantitative aptitude questions

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4 simple tricks to solve quantitative aptitude
questions
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• All the students have had their fair share of
  mathematics in school and college, but when it
  comes to solving aptitude questions, they
  struggle. The main reason they struggle is a time
  constraint. A simple math question can be solved
  by everyone, but if you have 50 questions to
  solve in 60 minutes, then your speed should be
  really good. I am not talking about
  your problem-solving speed, I am talking about
  adopting some methods that reduce your
  calculations dramatically and enable you to
  arrive at the answer in a fraction of the time
  you were spending earlier. In other words, you
  need to analyze different ways to solve
  quantitative aptitude questions and use the
  fastest among them.

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1. Use the options given to solve

• In a lot of quantitative aptitude questions, you
  can analyze the options given and easily
  eliminate the ones which cannot be justified with
  the question. Here is an example for you.
• Question Ages of A and B are in the ratio 74,
  after 5 years, the ratio becomes 117. What is
  the age of A?Options A. 11,  B. 18,  C. 21,  D.
  28
• Now, you know the age of A must be a multiple of
  7, and you can quickly eliminate option A and B.
  Now pay attention to option C, if we take the age
  of A as 21, then after 5 years, A will be 26
  years old. However, 26 is not a multiple of 11,
  and according to the question, As age after 5
  years should be amultiple of 11. There you go,
  eliminate option C too. Now youre only left with
  option D which is the answer. 28 is indeed a
  multiple of 7 and after 5years it would become
  33, which happens to be a multiple of 11.

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2. Dont compute everything, use options to
identify

• If you are given a complex calculation to do,
  just think for a second, there has to be a better
  way to do it. Because complex calculations are
  not tested in an aptitude test, your smartness
  is. Below is an example to for more clarity.
• Question 3812  5972 ?Options A. 456284, B.
  658598, C. 765454, D. 501570
• Now, to arrive at your answer, you can either
  manually calculate the squares or you can think
  in a smarter way. Square of 381 will definitely
  have the last digit of 1. (11)2 is 121, (21)2 is
  441, (31)2 is 961, and so on. So, 3812 would be
  something like this xxxxx1. Similarly, square of
  597 would be something like this, xxxxx9. 72 is
  49, and the last digit is 9, so 5972 has to end
  with 9. Now that you have 2 numbers, xxxxx1 and
  xxxxx9, just add them like an old fashioned
  addition question.
• xxxxx1xxxxx9______xxxxx0
• This way, you know the answer will end with 0,
  and now look at the options, your answer is D.
  Quantitative aptitude questions are a cakewalk if
  youre equipped with skills like these, download
  qriyo home tuition app and get yourself a home
  tutor to develop your skills while you still have
  time.

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3. Use effective percentage

• The concept of effective percentage can help to
  reduce your calculation time dramatically.
• You must have seen poster and banners outside
  shops offering 50 30 discount. The same kind
  of questions can be seen in most aptitude tests.
• This offer means, first you will calculate 50 of
  the MRP, and then apply a 30 discount on the new
  value (it is not straight 80). If a product is
  worth 100 rupees, then first apply 50 discount.
  You will arrive at 50 rupees, now apply 30
  discount, and you will arrive at 35.
• An alternate way of doing this is to use
  effective percentage.
• a b ab/100 (a and b are the percentages)
  (-)50 (-)30 (-50)(- 30)/100 -80
  1500/100 65.It means, that 50 off 30 off
  actually means flat 65 off on MRP. 65 off on
  100 is 35, which is the correct answer we arrived
  at earlier.
• Now, I added a (-) sign at the beginning of
  percentages, because they are discounts, we are
  reducing the amount of 100, not increasing it.
  Had there been a question of compound interest
  where the amount gets increased, you would a ()
  sign.

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4. Learn basic percentages

• If you want to calculate 10 of something, you
  would cut the zero at the end, or put a decimal.
  This much is known by most people and they dont
  do (number x 10/100). But what to do when you
  want to calculate 25 of a number? Or 76 of a
  number? You must be equipped with basic
  percentagerules to solve these things quickly.
• 25 is nothing but 1/4th of a number.75 would
  be 3/4th of a number.
• Just calculate 3/4th of your given number and you
  will arrive at 75. Now, calculate 1 by either
  cutting 2 zeroes from the end of your number, or
  by putting a decimal before 2 places at the end.
  Once you have that 1, add it to the 75 which
  you got.
• There you go, instead of doing (number x 76/100)
  and wasting precious time, you are now solving
  another question.
• There a lot of other cool tricks which not only
  come in handy for aptitude but also makes your
  brain faster. You will calculate some things in
  real life way quicker than others. It is indeed
  the basic reason for conducting an aptitude test
  so that you can develop your brains. Dont be
  afraid of quantitative aptitude questions,
  instead, take them as a challenge. You get these
  questions on your WhatsApp anyway, and you show
  great interest in solving them before your
  friends do.

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• If youre preparing for any kind of aptitude
  test, just head to qriyo websiteor qriyo home
  tuition app, and get yourself a home tutor. With
  his/her expertise and personal attention, you
  will crack the exam in no time. If you did not
  have math in your 11th and 12th, you should
  definitely get a home tutor to clear your basics
  and apply these trick seamlessly.
• Source https//www.qriyo.com/blog/tricks-solve-qu
  antitative-aptitude-questions/