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3. Practice to Intuitively Solve Problems

Logical Reasoning questions need to be solved with a particular line of thinking. You might know all the conditions necessary to solve the problems. But it is important to know which
condition to use when and arrive at the solution in the minimum time possible. This is what we mean by intuitive thinking or the sixth sense that you need to develop to solve the questions. This would come only by practice. You can still develop it with fewer days in hand.

4. Tackle Logical Reasoning Differently

LR is quite different in nature compared to other sections. Hence, one needs to highlight some general strategies specifically applicable to LR.

1. Accuracy is far more important in LR. There is no bigger mistake than getting the complete set wrong. Avoid making guesses or reading in a hurry as it would lead to decreased accuracy.

2. As far as possible, do not attempt LR in the beginning. If you get the set wrong or if it is tough and takes more time, that would affect your performance subsequently.

3. Use the option substitution method judiciously. LR questions are typically not meant to be solved using substitution of options. The most effective way is to understand the logic behind the question and solve it. There are exceptions to this rule though, and you should use them wisely.

5. Read & Understand the Common Data & Questions Thoroughly

LR questions appear lengthy as compared to DI sets as they typically offer more information in text. While reading them, one might feel a lot of time is wasted. Yet, it helps to understand every condition thoroughly before attempting the questions. You may need to re-visit the conditions while solving questions. Consider it time utilized, not wasted.

To illustrate these points, let's look at an LR caselet from CAT 2006, which is one of the more difficult caselets to have appeared in CAT. You could try the caselet on your own, before proceeding to the suggested solution method: -

Erdös Number

Mathematicians are assigned a number called Erdös Number (named after the famous mathematician, Paul Erdös). Only Paul Erdös himself has an Erdös number of zero. Any mathematician who has written a research paper with Erdös has an Erdös number of 1. For other mathematicians, the calculation of his/her Erdös number is illustrated below: -

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