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What is the greatest prime number between 1 and 20?

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NCERT TELUGU-PLAYING WITH NUMBERA-EXERCISE
  1. Which of the following pairs are co-prime? (i)18 and 35, (ii) 216 and ...

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  2. Which of the following pairs are co-prime? (¡) 30 and 415, (ii) 17 and...

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  3. What is the greatest prime number between 1 and 20?

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  4. Find the prime and composite numbers between 10 and 30?

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  5. The numbers 17 and 71 are prime numbers. Both these numbers have same ...

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  6. Write three pairs of twin primes below 20?

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  7. Write two prime numbers whose product is 35?

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  8. Express 36 as the sum of two odd primes.

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  9. Write seven consecutive composite numbers less than 100.

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  10. Express 53 as the sum of three primes?

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  11. Write two prime numbers whose difference is 10?

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  12. Write three pairs of prime numbers less than 20 whose sum is divisible...

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  13. Write the prime factors of 28 and 36 through division method.

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  14. Write the prime factors of 42 by factor three method.

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  15. Write the missing numbers in the factor tree for 90? <image src=https:...

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  16. Factorise 84 by division method?

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  17. Write the greatest 4 digit number and express it in the form of it’s p...

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  18. I am the smallest number, having four different prime factors. Can you...

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  19. Find the HCF of 12, 16 and 28.

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  20. Find the HCF of 28, 35 and 49.

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