Q38 of 142 Page 88

Fill in the blanks to make the statements true :

The sum of first six odd natural numbers is …………. .

∵ Every square can be expressed as a sum of successive odd natural numbers from 1.


⇒ The sum of first n odd natural numbers is n2


Here, n = 6 ⇒ 1 + 3 + 5 + 7 + 9 + 11 = 6× 6 = 36

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36

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Ones digit in the cube of 38 is ……………. .

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The square of 0.7 is …………… .

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Fill in the blanks to make the statements true :

The digit at the ones place of 572 is ………. .

 40

Fill in the blanks to make the statements true :

The sides of a right triangle whose hypotenuse is 17 cm are ……….. and …………. .