# **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– **

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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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