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If x be a rational number and y be an ir...

If x be a rational number and y be an irrational number, then :

A

both a + y and xy are necessarilly irrational

B

both x + y and xy are necesserlly rational

C

xy is necessarlly irrational but x + y can be either rational or irrational

D

x + y necessarlly irrational but xy can be either rational or irrational

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QUANTUM CAT-NUMBER SYSTEM-QUESTION BANK
  1. Which one of the following statements is correct ?

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  2. Which one of the following statements is not correct ?

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  3. If x be a rational number and y be an irrational number, then :

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  4. A rational equvivalent to -24/20 with denominator 25 is :

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  5. Let a/b = c/d, (where a and b are odd prime numbers) . If c > a and d ...

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  6. Find the number of values of q so that p/q is always a recurring decir...

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  7. Find the number of values of q so that p/q is always a recurring decir...

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  8. 42% of a number is 357. What is 63% of that number?

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  9. The difference between the highest and lowest three digit number is :

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  10. When a two digit number is reversed, then the new number becomes 5/6 t...

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  11. The number of two digit numbers which on being reversed (i.e., their d...

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  12. The number of two digit numbers which are prime :

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  13. The number of two digit prime numbers, with distinct digits, on being ...

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  14. The total number of two digit numbers whose unit digit is either, same...

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  15. The number of two digit numbers which are perfect square and perfect c...

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  16. Aprajita multiplies a number by 72 insted of 27, then her new answer w...

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  17. If the numerator and denominator of a fraction are exchanged then the ...

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  18. 5/4 th of a number is 60 more than half of the same number the require...

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  19. When 50 is added to the 50% of a number, then the number becomes itsel...

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  20. If we reverse the digits of a two digit number then the difference bet...

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