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the H.C.F. of two numbers is 145, their ...

the H.C.F. of two numbers is 145, their L.C.M. is 2175. If one number is 725, find the other.

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RD SHARMA-PLAYING WITH NUMBERS-All Questions
  1. The L.C.M. and H.C.F. of two numbers are 180 and 6 respectively. If...

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

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

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

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  5. Which of the following numbers is a perfect  number? 4      (b)  12...

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  6. Which of the following are not twin-primes? 3, 5          (b)  5, 7...

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

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

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

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

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

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  12. The total number of even prime numbers is 0      (b)  1      (c)   ...

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  13. Which one of the following is a prime number? 161      (b)  221    ...

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  14. The least prime is 1         (b)   2         (c)  3       (d)  5

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  15. Which of the following numbers is divisible by 24?

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  16. Which of the following numbers is divisible by 4? 8675231        ...

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  17. Which of the following numbers is divisible by 6? 7908432       ...

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  18. Which of the following numbers is divisible by 8? 87653234         ...

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  19. Which of the following numbers is divisible by 9? 9076185          ...

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  20. Which of the following numbers is divisible by 11? 111111    (b)...

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