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The H.C.F. and L.C.M. of two numbers are...

The H.C.F. and L.C.M. of two numbers are 13 and 1989 respectively. If one of the numbers is 117, determine the other.

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RD SHARMA ENGLISH-PLAYING WITH NUMBERS-All Questions
  1. Find the H.C.F. and L.C.M. of 1152 and 1664.

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  2. Given that the H.C.F. of two numbers is 16 and their product is 640...

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  3. The H.C.F. and L.C.M. of two numbers are 13 and 1989 respectively. ...

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  4. Can two numbers have 18 as their HCF and 380 as their LCM? Give reason...

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  5. For each of the following pairs of numbers, verify the property: pro...

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  6. Find the H.C.F. and L.C.M. of the following pairs of numbers: (i) 11...

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  7. The L.C.M. and H.C.F. of two numbers are 180 and 6 respectively. If...

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  8. The H.C.F. of two numbers is 16 and their product is 3072. Find the...

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  9. the H.C.F. of two numbers is 145, their L.C.M. is 2175. If one numb...

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  10. Can two numbers have 18 as their HCF and 380 as their LCM? Give reason...

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  11. Which of the following numbers is a perfect number? (a) 16       ...

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  12. Which of the following are not twin-primes? (a) 3, 5           (b) 5,...

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  13. Which of the following are co-primes? (a) 8, 10          (b) 9, 10...

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  14. Which of the following is a prime number (a) 263          (b) 361 ...

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  15. The number of primes between 90 and 100 is (a) 0        (b) 1     ...

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  16. Which of the following numbers is a perfect number? (a) 16       ...

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  17. Which of the following is a prime number? (a) 203         (b) 139 ...

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  18. The total number of even prime numbers is (a) 0      (b) 1      (...

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

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  20. The least prime number is (a)1         (b)2         (c)3       (...

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