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Article: "CAT 2009: Preparation of Math For CAT"

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CAT 2009: Preparation of Math For CAT

TestFunda.com *

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Question: (CAT '05)

In the following figure the diameter of a circle is 3 cm. AB and MN are two diameters such that MN is perpendicular to AB. In addition, CG is perpendicular to AB such that AE : EB = 1: 2, and DF is perpendicular to MN such that NL : LM = 1: 2. The 1ength of DH in cm is

(a) 2√2 – 1 (b) (2√2 -1)/2 (c) (3√2 - 1)/2 (d)(2√2 -1)/3

Solution:
In this case AE is 1. Also DH is less than AE so it has to be less than 1. From options value of (b) 0.9 and that of (d) is 0.6. But if you draw to scale you will realize that DH is almost similar to AE and can't be 0.6. So the answer has to be (b).

Question: (CAT '04)
A circle with radius 2 is placed against a right angle. Another smaller circle is also placed as shown in the adjoining figure. What is the radius of the smaller circle?

(a) 3-2√2 (b) 4-2√2 (c) 7-4√2 (d) 6-4√2

Solution:
Radius of bigger Circle is 2. So diameter of the smaller circle is less than 1. So radius of smaller circle is less than 0.5. From options (a) is 0.2 and (d) is 0.4. So the answer is (d) as it can’t be as small as 0.2.

What should be done to improve Math in the last month?

  • Keep away from formulae. The less formulae you know the better it is. Obviously you need to know basic formulae like 1 + 2 + 3 + … = n(n+1)/2 or (a+b)2 = a2 + 2ab + b2. But don’t get into any new formulae you have not heard of. It will only slow you down.

  • Go back to all the mocks you have solved and go through the questions again to search for better ways of solving. If you find it write it down next to the sum so that when you go through the paper again you could remember the methods you used. Also once before the exam go and check the shortcut methods you used to solve the sums. This would ensure that it is fresh in your mind when you solve the paper.

  • Continue writing the usual Mock Papers and analyze it. Try to get better ways of solving it than that provided by explanatory answers.

  • Go through the 5 previous CAT papers and see if you could get methods to solve the questions there. Understand this that CAT does not repeat questions, but the methods used to solve CAT sums can be repetitive as shown in the examples given below.

  • There is one more important thing since CAT has gone online this year onwards you must study as much online as possible. You could purchase online tests and study material from Testfunda.com: The Leader in Online Test Prep.

    • Concluded.



    * Powered by TestFunda.com
    The article has been written by Patrick D'souza, BE, MMS from JBIMS and a CFA for TestFunda.com. Testfunda.com, is the Leader in Online MBA test preparation & is managed by a team of 4 IIT-IIM Alumni backed by a team of  85+ Educationists, Instructional Designers and Systems Architects with vast experience in MBA Coaching and Computer-Based Training-Testing.

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