CAT 2011: QuantoLogic Analysis

I finished my CAT 2011 journey in the initial phases. So did some other friends who are involved with us at Quantologic. Here is our analysis.

1. CAT 2011 is a tad difficult when compared to CAT 2010/CAT 2009.
2. The data intensive complicated logical reasoning questions have disappeared and the focus is more on basic understanding of problem solving techniques.
3. The onus is on the student to solve the easy questions.
4. Every paper especially the Quant and DI section has enough sitters for an average student to crack. We must also mention that every paper has around 6-8 difficult to very difficult questions which require analytical imagination.
5. Section 1 feels short of time, you need to choose your questions well and take no more than 2-3 minutes to solve any question.
6. There are some DI questions which require lengthy calculations, but the calculations can be remarkably reduced by making smart approximations and using the options well.
7. The number of Data Sufficiency questions have gone down considerably.
8. The questions are focused on basic concepts and formulae and one needs to be able to solve questions from first principles rather than imaginative methods.
9. Read each question carefully before you start solving and try to look at the options as some of the questions will require much less work if you use the options.
10. Overall an intelligent test.

Cheers!
Rahul

Problem of the Day 12 Oct 2011

How many factors of  have last digit 2?

Problem of the Day 10 Oct 2011

Ten identical boxes of dimensions  are stacked flat on top of each other, with the orientation of each box being independent and random. If  is the probability that the height of the stack is  and , find . All units are in feet.

Problem of the day 8th oct 2011

Rohan is asked to figure out the marks scored by Sunil in three different subjects with the help of
certain clues. He is told that the product of the marks obtained by Sunil is 72 and the sum of the
marks obtained by Sunil is equal to the Rohan’s current age (in completed years). Rohan could not
answer the question with this information. When he was also told that Sunil got the highest marks
in Physics among the three subjects, he immediately answered the question correctly. What is the
sum of the marks scored by Sunil in the two subjects other than Physics?

(a) 6                  (b) 8                (c) 10               (d) Cannot be determined

Problem of the day 7th Oct 2011

Ten books are arranged in a row on a bookshelf. A student has to select three out of these ten books
in such a way that no two books selected by him must have been lying adjacently. In how many
ways can he make the selection?
(a) 56                                (b) 64                           (c) 72                    (d) None of these

Problem of the day 26 Sept 2011

Let a₁= 2 and a_n+1 = 2a_n + 1. Find the least value of a_n which is not prime.

(a) 47                  (b) 4                    (c) 5                 (d) 95

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Problem of the day 15 sept 2011

Rachel and Brian are playing a game in a grid with 1 row of 2011 squares. Initially, there is one
white checker in each of the first two squares from the left, and one black checker in the third square
from the left. At each stage, Rachel can choose to either run or ght. If Rachel runs, she moves the
black checker 1 unit to the right, and Brian moves each of the white checkers one unit to the right. If
Rachel chooses to fight, she pushes the checker immediately to the left of the black checker 1 unit to
the left, the black checker is moved 1 unit to the right, and Brian places a new white checker in the
cell immediately to the left of the black one. The game ends when the black checker reaches the last
cell. How many different final configurations are possible?

a) 2011   b) 2010  c) 2009 d) None

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