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Show that the square of any positive int...

Show that the square of any positive integer cannot be of the form 6m+2 or 6m+5 for some integer q.

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To show that the square of any positive integer cannot be of the form \(6m + 2\) or \(6m + 5\) for some integer \(m\), we will analyze the possible forms of a positive integer when divided by 6. ### Step 1: Represent any integer in the form of \(6m + b\) Any integer can be expressed in the form \(6m + b\), where \(b\) can take values \(0, 1, 2, 3, 4, 5\). ### Step 2: Calculate the square for each case of \(b\) Now, we will calculate the square of \(q = 6m + b\) for each possible value of \(b\): ...
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NCERT EXEMPLAR-REAL NUMBERS-Real Numbers
  1. A rational number in its decimal expansion is 327.7081. What can you s...

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  2. Prove that the square of any positive integer is of the form 4q or ...

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  3. Show that cube of any positive integer is of the form 4m, 4m+1 or 4m+3...

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  4. Show that the square of any positive integer cannot of the form 5q+2 o...

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  5. Show that the square of any positive integer cannot be of the form 6m+...

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  6. Show that the square of any odd integer is of the form 4m+1, for some ...

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  7. If n is an odd positive integer, show that (n^2-1) is divisible by 8.

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  8. Prove that if xa n dy are odd positive integers, then x^2+y^2 is even ...

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  9. Use Euclid division algorithm to find the HCF of 441, 567 and 693.

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  10. Using Euclid's division algorithm, find the largest number that divide...

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  11. Prove that sqrt3+sqrt5 is irrational

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  12. Show that 12^n cannot end with the digits 0 or 5 for any natural numbe...

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  13. In a morning walk, three persons step off together and their steps mea...

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  14. Write the denominator of the rational number 257/5000 in the form 2^m ...

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  15. Prove that sqrtp+sqrtq is an irrational, where p and q are primes.

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  16. Show that the cube of a positive integer of the form 6q+r,q is an inte...

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  17. Show that one and only one out of n ,n+2or ,n+4 is divisible by 3, whe...

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  18. Prove that one of every three consecutive positive integers is divi...

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  19. For any positive integer n , prove that n^3-n divisible by 6.

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  20. Show that one and only one out of n, n + 4, n + 8, n + 12 and n + 16 i...

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