Standard Eight Mathematics>Chapter 1 - Numbers>Example>Q 19

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8th Tamil Nadu Board

IMPORTANT

Earn 100

Find the rational numbers that should be added and subtracted so that they will make the sum $3 \frac{1}{2} + 1 \frac{3}{4} + 2 \frac{3}{8}$ to the nearest whole number.

Important Questions on Numbers

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8th Tamil Nadu Board

IMPORTANT

Standard Eight Mathematics>Chapter 1 - Numbers>Example>Q 20

A student instead of multiplying a number by

\frac{8}{9}

, by mistake divided it by

\frac{8}{9}

. If the difference between the correct answer and the answer got by him is

7 \frac{5}{8} + \frac{3}{8} = (\frac{61}{8} + \frac{3}{8}) = \frac{64}{8} = 8

, then find the number.

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8th Tamil Nadu Board

IMPORTANT

Standard Eight Mathematics>Chapter 1 - Numbers>Example>Q 21

Simplify: (\frac{4}{3} - (\frac{- 3}{2})) + (\frac{- 5}{3} \div \frac{30}{12}) + (\frac{- 12}{9} \times \frac{- 27}{16})

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8th Tamil Nadu Board

IMPORTANT

Standard Eight Mathematics>Chapter 1 - Numbers>Example>Q 22

The area of a square field is $3136 m^{2}$ . Find its perimeter.

Question Image

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8th Tamil Nadu Board

IMPORTANT

Standard Eight Mathematics>Chapter 1 - Numbers>Example>Q 23

A real estate owner had two plots, a square plot of side

39 m

and a rectangular plot of dimensions

100 m

length and

64 m

breadth. He sells both of these plots and acquires a new square plot of the same area. What is the length of side of his new plot?

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8th Tamil Nadu Board

IMPORTANT

Standard Eight Mathematics>Chapter 1 - Numbers>Example>Q 24

Find the square root of

324

by prime factorisation.

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8th Tamil Nadu Board

IMPORTANT

Standard Eight Mathematics>Chapter 1 - Numbers>Example>Q 25

Find the least number by which

250

is to be multiplied (or) divided so that the resulting number is a perfect square. Also, find the square root in that case.

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8th Tamil Nadu Board

IMPORTANT

Standard Eight Mathematics>Chapter 1 - Numbers>Example>Q 26

Is

108

a perfect square number?

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8th Tamil Nadu Board

IMPORTANT

Standard Eight Mathematics>Chapter 1 - Numbers>Example>Q 27

Find the square root of

459684

by long division method.