[Official] Quant Thread for 2015!

Could not get the logic behind this one....

And This one...

Find the remainder when 39! is divided by 41.

Mental Exercise on how accurately/nicely can you guess what others are guessing. THIS QUESTION WON'T COME IN CAT.

Please don't skip question to see the answer. This is a guessing game. I just hope you will guess number based on some logic. I won't mark the correct answer, just explain why you think your answer should be correct in the comments below. :) 

There was an experiment where readers of New York Times were asked to guess an integer from 0 to 100. And the number they were supposed to enter should have been their best guess of what is two-thirds of the average of all the submissions made by the readers. 

For eg. If you think average would have been 90, enter 2/3 of 90 i.e. 60. If you get a decimal value, you must round it off to the nearest integer like this, if 38.66 then enter 39.

(Around 60,000 people guessed the number in this experiment. Keep in mind it was read by junta in New York and the pool was mixed. There were people good with numbers/brokers along with people who just goof around.)

PS - I am making groups, because I can't add 101 numbers here. Answer given actually was a number and not the range but I think if you can even mark the correct range, consider yourself a winner 😃 I will share answer later. THIS QUESTION HAS MORE TO IT THAN MEETS THE EYE. SO USE LOGIC PROPERLY

Oh and dont forget to TAG your friends, it will be fun 😃

HOW MANY NUMBERS WILL BE THERE AT THE END WHEN 12! IS EXPRESSED IN BASE 6?

any short trick?

ans-5

starting with positive integers are written one after the another, what will be the 40,000th digit that will be written?

how to approach (dnt know the answer)

In a triangle ABC , AB = x, BC = x+1 , angle C = π/3 , then find the least integral value of x 
A. 6
B. 8
C. 7
D. 3
E.none

n is a natural number. 2n has 28 divisors. 3n has 30 divisors. how many divisors will 6n have?

answer-35

solution?

Amit was driving his scooter. He realized that after 10 km of driving some fault occurred in the scooter and his speed reduced by 2/5th. Amit reached his destination point 30 minutes late. Had the same problem developed after travelling 15 km, then he would have reached 20 minutes late. what is the total distance of journeyHint ans: 25 km

http://maths.wordpandit.com/finding-last-non-zero-digit-of-any-factorial/

                            90 days for a '3hr CAT Exam'

To, CAT Aspirants,

Batch 2015.

Introducing: Pre CAT - PDP 'PRACTICE, DEDICATION, and PATIENCE.'

All the above three are what we need to sail our boat over the tumultuous sea of CAT. Remember you are not alone. We as a team are rowing your boat over the high seas. The journey is as important as the destination. It is important to strategize the journey, so I am writing to you about how to be calm and focused in this journey of 9odays. As we are reaching closer to the CAT examination, the feeling of giving our best shot and anxiety is increasing proportionally.

Every CAT aspirant has different reasons of writing this CAT exam. Some want to prove to their family and relative that they have potential, somebody wants to show his girlfriend or her boyfriend that you lost the goldmine and some of them really don't want to face the excellent appraisal meeting in which they will be proved that they are asset to the company but the company cannot give you more than 10% hike and finally that 'I was not able to crack IIT-JEE'..uffffffffff ...the list goes on.

So many reasons to write CAT. But dear CAT friends /aspirants, you guys don't need to prove yourself anymore. WHY? You all are well educated to fend for yourself and you are part of as well as contributors to the booming economy of this world, and you are the one on whose behalf our Prime Minister is showing his grit and power.

I believe that everyone's preparation must be in full swing, there must be some people who are still confused from where to start, how to do the revision, which all test series I can join and finally previous year CAT papers and above all after putting so many efforts my performance is not reflecting in the Mock papers. What to do?

Here are certain guidelines; I am sharing with you all on the basis of my experience in the teaching industry. Please try to follow I am sure it will surely ease out your pressure.

1. Interaction with Mentor: This is the most important pillar of your preparation which majority of students overlook. Try to sit and discuss your strength and weak areas, process and progress of your preparation with your concerned faculty. Do not have communication gap with your faculties till the last day of your exam and make sure that keep updating your Mentor about your performance.

2. Work also with your weak area: It is extremely important that you should not leave any topic blindly just because you are not able to solve any questions from that topic. Try to discuss the approach of this topic with your Mentor and go ahead with this topic. Do not try to solve the questions from this topic only with objective of getting the answers as it may not give comfort to you but only for some time. Try to solve only basic and fundamental questions. Continue with this topic till the end of September.

3. Revision: It's a myth that learning can happen when every time you solve new questions. As we all know that none of the questions are going to be the part of the CAT exam or any exam rather what is going to be the part of CAT exam is the conceptual application. Try to start you revision from first week of September and simultaneously keep on solving the questions from the test series.

4. Objective of test series: I am sure everyone must be writing the test papers of various coaching institutes and I am hoping that they are giving you the true reflection of your efforts but writing the mock paper is a very simple job which anyone can do. Yes my dear CAT aspirants it's a very simple job and after writing the test passing a comment that Quant was challenging , LRDI no chance of any interpretation and English "vo kabhi sahi hui hai !!" is even more simpler. It's really disappointing to listen to all these things from young blood, as this was never the motto of Test - Series.

Now everyone understand this part very carefully that next when you are going to write the Mock paper do two simple things.

a) First, try to be alert, active and focused for those 180 minutes irrespective of the level of difficulty or the number of questions you are able to answer. Trust me the only thing which is going to be constant in any test series and CAT is 180 minutes, so train your mind for those 180 minutes and not just for those questions.

b) Two, get an overview of the question types you can solve consistently and the ones you cannot. Set a target of ten days till the next mock to work with the ones you could not and keep revising the ones you could. 5. No research only solution: I have seen some of the students come and discuss challenging questions and say sir we have given 2-3 hours but not able to get the answers but remember if you are not able to answer those questions its ok, your only focus is to get exposure the moment you stick to the problems you are wasting your crucial time.

6. No Predictions: Now days new psychological discussions are around the corner - like IIMA is setting the paper so, Quant is going to be challenging and they never ask flat or simple LRDI and English is their forte so overall CAT is not happening WOW!!!! You should be happy that you are the part of the world where technology has played a very important role in your life ..so use it positively. As a student your job is just to prepare for the exam and get ready to deal with those 180 minutes that's it. No prediction and no judgment. Next time if somebody says something like this please say Best of Luck and why don't you come on Aaj Tak "Aapke taare".

7. Group studies: Sometimes it is very important to take out some time and sit with your friends who are preparing for CAT and then discuss of some questions . This will surely give you some breathing space and it will help you not just academically but how to work as a team and in a team, If you are good then try to add some value and if you struggling then try to learn. At the end it is nothing but just the "Aptitude Test"

1st to 15th September: Revision

a. Quant: Glimpse the theory and then try to solve only 10 - 15 questions of every topic.

b. LRDI: Identify the good sets which you have solved earlier and try to solve them one more time

c. English: Revise your class notes and sheets. Any doubt with the concept please connect with your mentor. Work with the online module tests, analyze your performance.

16th September to 30th September:

a. Sectional tests: Try to wind up the entire sectional tests which are still pending from all the topics. b. Work on your weak areas and make sure if you are still struggling psychologically in any topic discuss with your concerned Mentor.

1st October to 30th October:

a. Analyze all the previous mock papers if you have not.

b. Take the new mocks seriously and immediately analyze them as soon as the solution is published.

c. If you are not able to improve your performance in the weak area then it the time to move on and leave that topic.

d. Whenever you get time try to look at the formulas and theorems e. Try to solve at least one set of DI/LR/RC and 10 questions of quant/vocab from various sources or forums.

The objective of this article was to outline a general plan of action about how to go ahead in these coming months and how can you make the process of preparation stress free. Wait for the next article in which will let know what to do in the month of November till then "Stay Focused, Stay calm coz what matters is the RIGHT ATTITUDE"

Anurag Sharma

Mentor

A number is formed by writing the numbers 1 to 30 in order as shown
12345678910111213.........2930
Simon removed 45 of these 51 digits leaving 6 in their original order to make the largest 6 digit number possible. What is the number and the sum of the digits of this number?

A shopkeeper gains 17% after allowing a discount of 10% on the market price of an article. Find his profit percent if the article is sold at market price allowing no discount ?

the probability that sachin scores a century in a match is 1/7. In a five match series what is the probability that sachin scores atleast 3 centuries.

x is a real number satisfying the equation x^3 + 5x = 10. Evaluate the value of the following expression:-
x^7 + 100x^2 + 25x 

What are the common topics asked in quants and LR??

450 mangoes were sold at 9%, 10% and 12% profit in three parts respectively. The first two categories gave an overall profit of 9 3/7 %(66/7 %). All three categories gave an aggregate profit of 10%. The number of mangoes in the first category(9% profit) was ??

0 ≤ b ≤ a ≤ 1. If λ is a real root of x2 + ax + b = 0, which of the following is the finest approximation of λ?

a) 1/2

b)3/2

c)1

d) -1 to 0

14 : 9, 26: ?. 

options- 15, 14,13, 12

ACFJ:OUZJ, SUXB: ?

options- GNSA, GLQZ, GKPY, GMRB

plzz explain d ans