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Every counting number has an infinite nu...

Every counting number has an infinite number of (a )factors                    (b)  multiplies         prime factors          (d)  None of these

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RD SHARMA ENGLISH-PLAYING WITH NUMBERS-All Questions
  1. Which of the following numbers is not divisible by 4? (a) 78536     ...

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  2. The smallest prime just greater than the HCF of 84 and 144 is (a) 1...

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  3. Every counting number has an infinite number of (a )factors           ...

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  4. What least number should be replaced by * so that the number 37610*2...

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  5. Define a perfect number. Write two perfect numbers.

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  6. Make a list of seven consecutive numbers, none of which is prime.

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  7. The HCF of two numbers is 23 and their product is 55545. Find their...

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  8. Find the smallest 5-digit number which is exactly divisible by 20, ...

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  9. Find the largest number which divides 615 and 963 leaving remainder...

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  10. The length, breadth and height of a room are 1050 cm, 750cm and 425...

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  11. Find the greatest number of four digits which is exactly divisible ...

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  12. Reduce (289)/(391) to the lowest terms

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  13. Three tankers contain 403 litres, 434 litres and 465 litres of dies...

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  14. A number which has only two factors is called a ...........

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  15. The smallest composite number is ............

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  16. Two perfect numbers are ............ and ............

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  17. The HCF of two consecutive odd numbers is ............

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  18. The prime triplet is ...

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  19. The greatest five digit number exactly divisible by 9 and 13 is (a)...

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  20. From the set {2, 3, 4, 5, 6, 7, 8, 9}, how many pairs of co-primes can...

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