CAT 1991 Question Paper

Instructions

For the following questions answer them individually

Question 21

$$2^{73}-2^{72}-2^{71}$$ is the same as

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Question 22

The number of integers n satisfying -n+2 ≥ 0 and 2n ≥ 4 is

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Question 23

The sum of two integers is 10 and the sum of their reciprocals is 5/12. Then the larger of these integers is

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Question 24

A circle is inscribed in a given square and another circle is circumscribed about the square. What is the ratio of the area of the inscribed circle to that of the circumscribed circle?

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Question 25

If $$y = f(x)$$ and $$f(x) = \frac{(1-x)}{(1 + x)}$$, which of the following is true?

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Instructions

There were a hundred schools in a town. Of these, the number of schools having a play - ground was 30, and these schools had neither a library nor a laboratory. The number of schools having a laboratory alone was twice the number of those having a library only. The number of schools having a laboratory as well as a library was one-fourth the number of those having a laboratory alone. The number of schools having either a laboratory or a library or both was 35.

Question 26

How many schools had none of the three viz., laboratory, library or play - ground?

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Question 27

What was the ratio of schools having laboratory those having library?

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Instructions

For the following questions answer them individually

Question 28

A player rolls a die and receives the same number of rupees as the number of dots on the face that turns up. What should the player pay for each roll if he wants to make a profit of one rupee per throw of the die in the long run?

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Question 29

Three machines, A, B and C can be used to produce a product. Machine A will take 60 hours to produce a million units. Machine B is twice as fast as Machine A. Machine C will take the same amount of time to produce a million units as A and B running together. How much time will be required to produce a million units if all the three machines are used simultaneously?

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Question 30

Let Y = minimum of {(x+2), (3-x)}. What is the maximum value of Y for 0 <= x <=1?

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