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Without adding ,find the sum : 1+3+5+7+9...

Without adding ,find the sum :
1+3+5+7+9.

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SWAN PUBLICATION-SQUARES AND SQUARE ROOTS-Exercise 6.1
  1. The following numbers are obviously not perfect squares. Give reason :...

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  2. The following numbers are obviously not perfect squares. Give reason :...

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  3. The following numbers are obviously not perfect squares. Give reason :...

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  4. The following numbers are obviously not perfect squares. Give reason :...

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  5. The following numbers are obviously not perfect squares. Give reason :...

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  6. The following numbers are obviously not perfect squares. Give reason :...

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  7. The following numbers are obviously not perfect squares. Give reason :...

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  8. The following numbers are obviously not perfect squares. Give reason :...

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  9. The squares of which of the following would be odd numbers : 431

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  10. The squares of which of the following would be odd numbers : 2826

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  11. The squares of which of the following would be odd numbers : 7779

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  12. The squares of which of the following would be odd numbers : 82004

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  13. Observe the following pattern and find the missing digits: 11111^2 = 1...

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  14. Observe the following pattern and supply the missing numbers: 10101^2 ...

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  15. Using the given pattern, find the missing numbers. 1^(2) + 2^(2) + 2...

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  16. Without adding ,find the sum : 1+3+5+7+9.

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  17. Express 49 as the sum of 7 odd numbers.

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  18. How many numbers lie between squares of the following numbers: 12 and...

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  19. How many numbers lie between squares of the following numbers: 25 and...

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  20. How many numbers lie between squares of the following numbers: 99 and...

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