Questions by purvi

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Find m so that `(–3)^(m + 1) xx (–3)^5 =

asked Jan 18, 2022 in 8th-maths

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Evaluate. `(– 4)^(– 2)`

asked Jan 18, 2022 in 8th-maths

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asked Jan 18, 2022 in 8th-maths

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Express the following numbers in standard form.

asked Jan 18, 2022 in 8th-maths

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Express the following numbers in usual form. `7.54 xx 10^(– 4)`

asked Jan 18, 2022 in 8th-maths

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In a stack there are 5 books each of thickness 20mm and 5 paper sheets each of thickness 0.016 mm. What is the total thickness of the

asked Jan 18, 2022 in 8th-maths

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Following are the car parking charges near a railway station upto 4 hours Rs 60 8 hours Rs 100 12 hours Rs 140 24 hours Rs 180Check if the parking charges are in direct proportion to the parking

asked Jan 18, 2022 in 8th-maths

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Which of the following are in inverse proportion?(i) The number of workers on a job and the time to complete the job.(ii) The time taken for a journey and the distance travelled in a uniform speed.(iii) Area of cultivated land and the crop harvested.(iv) The time taken for a fixed journey and the speed of the vehicle.(v) The population of a country and the area of land per

asked Jan 18, 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 18, 2022 in 8th-maths

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Factorise the following using the identity `a^2 – b^2 = (a + b) (a – b)`. `16x^4 –

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)`. `(a – b)^2 – (b –

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 – 6x +

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 + 9x +

asked Jan 17, 2022 in 8th-maths

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The area of a square is `9x^2 + 24xy + 16y^2`. Find the side of the

asked Jan 17, 2022 in 8th-maths

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Verify the following: `(a – b) (a – b) (a – b) = a^3 – 3a^2b + 3ab^2 –

asked Jan 17, 2022 in 8th-maths

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Find the value of (i) `(6.25 6.25 –1.75 1.75)/4.5` (ii) `(198 198 –102

asked Jan 17, 2022 in 8th-maths

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`3^(–2)` can be written

asked Jan 17, 2022 in 8th-maths

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If x be any non-zero integer, then `x^–1` is equal

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 integer x, `x^7 -: x^12` is equal

asked Jan 17, 2022 in 8th-maths

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