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Which of the following statemennts are t...

Which of the following statemennts are true ?
If two numbers are co-primes,at least one of them must be prime.

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NAND LAL PUBLICATION-PLAYING WITH NUMBERS -EXERCISE 3.5
  1. Check whether the given statement is true or not A number is divisib...

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  2. Which of the following statemennts are true ? A number is divisible by...

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  3. Which of the following statemennts are true ? If two numbers are co-pr...

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  4. Which of the following statemennts jare true ? All numbers which are d...

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  5. Which of the following statemennts are true ? All numbers which are di...

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  6. Which of the following statemennts jare true ? If a number exactly div...

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  7. Which of the following statemennts jare true ? If a number exactly div...

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  8. Here are two different factor trees for 60.Write the missing numbers.

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  9. Which factors are not included in the prime factorisation of a composi...

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  10. Write the greatest four digit number and express it in terms of its p...

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  11. Write the smallest five digit number and exress it in the form of its ...

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  12. Find all the prime factors of 1729 and arrange them in ascending order...

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  13. The product of three consecutive numbers is always divisible by 6.Expl...

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  14. The sum of two consecutive odd number is divisible by 4.Verify stateme...

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  15. In which of the following expressions, prime factorization has been do...

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  16. In which of the following expressions,prime factorisation has been don...

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  17. In which of the following expressions,prime factorisation has been don...

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  18. In which of the following expressions,prime factorisation has been don...

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  19. Determine if 25110 is divisible by 45.[Hint:5 and 9 are co-oprime numb...

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  20. 18 is divisible by both 2 and 3 .It is also divisible by 2 xx 3 = 6.Si...

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