CDAC CAT SectionA Practice Questions

11. A number is decreased by 20% and then increased by 40%.Find the percentage change in the number.





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12. The price of 4 apples and 6 mangoes is Rs.62 and the price of 6 apples and 4 mangoes is Rs.58. Find the price of 3 apples and 5 mangoes.





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13. A die and a coin are tossed simultaneously. The probability that the die showing a prime number and the coin showing a head is





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14. In what ratio should a class with average marks 34 be mixed with a class with average 22, so that the average of the mixed class is 31.





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15. Find the value of `[(0.8)^3 – (0.2)^3]/[(0.8)^2 + 0.16 + (0.2)^2]`





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16. Find the number of divisors of 36 excluding 1 and 36.





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17. Find the greatest





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18. In how many ways can a person put 4 letters in 4 envelopes such that exactly three letters are in their respective envelopes?





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19. How many numbers can be formed between 200 and 1200, using the digits 0, 1, 2 and 3, such that there is no repetition?





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20. If 6x^2 + 6y^2 = 13xy, find x:y.





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