Questions by nishit

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Express the following numbers in usual form. `3.02 xx 10^(– 6)`

asked Jan 17, 2022 in 8th-maths

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Express the following numbers in usual form. `3.61492 xx

asked Jan 17, 2022 in 8th-maths

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A train is moving at a uniform speed of 75 km/hour. How far will it travel in 20

asked Jan 17, 2022 in 8th-maths

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A 5 m 60 cm high vertical pole casts a shadow 3 m 20 cm long. Find at the same time the height of a pole which casts a shadow 5m

asked Jan 17, 2022 in 8th-maths

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In a Television game show, the prize money of Rs 1,00,000 is to be divided equally amongst the winners. Complete the following table and find whether the prize money given to an individual winner is directly or inversely proportional to the numberof

asked Jan 17, 2022 in 8th-maths

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A contractor estimates that 3 persons could rewire Jasminder’s house in 4 days. If, he uses 4 persons instead of three, how long should they take to complete the

asked Jan 17, 2022 in 8th-maths

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A batch of bottles were packed in 25 boxes with 12 bottles in each box. If the same batch is packed using 20 bottles in each box, how many boxes would be

asked Jan 17, 2022 in 8th-maths

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Factorise the following using the identity `a^2 – b^2 = (a + b) (a – b)`. `8a^3 –

asked Jan 17, 2022 in 8th-maths

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The following expressions are the areas of rectangles. Find the possible lengths and breadths of these rectangles. `x^2 + 19x –

asked Jan 17, 2022 in 8th-maths

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Perform the following divisions: `(– qrxy + pryz – rxyz) -: (–

asked Jan 17, 2022 in 8th-maths

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The area of a circle is given by the expression `πx^2 + 6πx + 9π`. Find the radius of the

asked Jan 17, 2022 in 8th-maths

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The radius of a circle is 7ab – 7bc – 14ac. Find the circumference of the circle.

asked Jan 17, 2022 in 8th-maths

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The product of two expressions is `x^5 + x^3 + x`. If one of them is `x^2 + x+ 1`, find the

asked Jan 17, 2022 in 8th-maths

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Take suitable number of cards given in the adjoining diagram [G`(x xx x)` representing `x^2`, R `(x xx 1)` representing x and Y `(1 xx 1)` representing 1] to factorise the following expressions, by arranging the cards in the form of rectangles: (i) `2x^2 + 6x + 4` (ii) `x^2 + 4x + 4`. Factorise `2x^2 + 6x + 4` by using the figure.

asked Jan 17, 2022 in 8th-maths

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Multiplicative inverse of `2^7`

asked Jan 17, 2022 in 8th-maths

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In `2^n`, n is known

asked Jan 17, 2022 in 8th-maths

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The value of `(–2)^(2xx3–1)`

asked Jan 17, 2022 in 8th-maths

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Which of the following is equal to `(-3/4)^(-3)`

asked Jan 17, 2022 in 8th-maths

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For a non-zero rational number z, `(z^-2)^3` is equal

asked Jan 17, 2022 in 8th-maths

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Which of the following is not the reciprocal of `(2/3)^4`

asked Jan 17, 2022 in 8th-maths

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