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Identify twin primes...

Identify twin primes

A

13,17

B

23,29

C

7,5

D

none of these

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NAND LAL PUBLICATION-PLAYING WITH NUMBERS -ADDITIONAL QUESTIONS FOR PRACTICE (VERY SHORT TYPE QUESTIONS)
  1. LCM of 999 and 1000 is

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  2. Greatest 2-digit prime number is:

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  3. Smallest odd composite number

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  4. Which of the following is a factor of every number

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  5. Identify twin primes

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  6. For any two numbers which is greater:

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  7. State whether the statement is true or not Sum of 2 prime numbers is ...

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  8. Check whether the statement is true or not Prime number are not divi...

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  9. Which of the following statemennts are true ? If a number is divisible...

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  10. Check whether the statement is true or not If a number is divided by ...

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  11. Check the statement is true or not Number 1is the multiple of every n...

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  12. Check whether the statement is true or not Sum of two odd numbers is ...

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  13. Check whether the statement is true or not Every number other than 1 ...

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  14. Fill in the blanks: The number which is neither prime nor composite ...

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  15. The smallest perfect number is ……..

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  16. A number which has more than two factors is called a number.

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  17. L.C.M. of 4,5,2 is ……….

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  18. The process of getting all the prime factors of a number is called ………...

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  19. Smallest number having three different prime factors is ………….

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  20. Two prime numbers whose difference is 2 are called ……………..

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