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

Without adding, find the sum:
`(1+3+5+7+9+11+13)`
`(1+3+5+7+9+11+13+15+17+19)`

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The correct Answer is:
`(14,48,50)`
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RS AGGARWAL-SQUARES-EXERCISE 3B
  1. Give reason to show that none of the number given below is a perfect s...

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  2. Which of the are square of even number ? 196 441 900 625 32...

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  3. Without adding, find the sum: (1+3+5+7+9+11+13) (1+3+5+7+9+11+13+1...

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  4. Express 81 as the sum of 9 odd numbers.

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  5. Express 100 as the sum of 10 odd numbers.

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  6. Write the Pythagorena triplet whose smallest number is 6 14 16 ...

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  7. Evalute: (38)^(2) - (37)^(2) (75)^(2)-(74)^(2) (92)^(2) -(91)^(2...

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  8. Using the formula (a+b)^(2) = (a^(2) + 2ab+b ^(2)), evaluate: (310)^...

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  9. Evaluate: 69xx71

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  10. Evaluate: 94xx106

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  11. Evaluate: 88xx92

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  12. Evaluate: 78xx82

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  13. Fill in the blanks: The square of an even number is ………

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  14. Fill in the blanks: The square of an odd number is ……….

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  15. Fill in the blanks: The square of a proper fraction is ……. than the ...

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  16. Fill in the blanks: n^(2)= the sum of first n……….natural numbers.

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  17. Write (T) for true and (F) for false for each of the statements given ...

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  18. Write (T) for true and (F) for false for each of the statements given ...

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  19. Write (T) for true and (F) for false for each of the statements given ...

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  20. Write (T) for true and (F) for false for each of the statements given ...

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