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Consider the following statements: (I) I...

Consider the following statements: (I) If `x and y` are composite numbers, then `x\ +\ y` is always composite. (2) There does not exits a natural number which is neither prime nor composite. Which of the above statements is/are correct? (a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2

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RS AGGARWAL-NUMBER SYSTEM-All Questions
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  2. The least prime number is 0              (b)   1           (c)   2...

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  3. Consider the following statements: (I) If x and y are composite number...

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  4. The number of prime numbers between 0 and 50 is 14          (b)...

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  6. The sum of the first four primes is (a) 10         (b) 11         (...

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  7. The sum of all the prime numbers from 1 to 20 is 75         (b)...

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  8. A prime number N, in the range 10 to 50, remains unchanged when its...

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  9. The remainder obtained when any prime number greater than 6 is divi...

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  10. Which of the following is not a prime number? 21           (b)  23 ...

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  11. Which of the following is a prime number 19          (b)  20      ...

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  12. Which of the following is a prime number? (a) 115       (b) 119    ...

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  13. Which of the following is a prime number? (a) 143       (b) 289    ...

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  14. The smallest value of natural number n, for which 2n + 1 is not a p...

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  15. The smallest three-digit prime number is 101          (b)  103    ...

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  16. How many of the integers between 110 and 120 are prime numbers? 0  ...

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  17. Four prime numbers are arranged in ascending order. The product of ...

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  18. The sum of three prime numbers is 100. If one of them exceeds anoth...

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  19. Which one of the following is a prime number? 161          (b)   22...

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  20. The smallest prime number, that is the fifth term of an increasing ...

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