Questions by purvi

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`(–7)^(–4) xx (–7)^2 =

asked Jan 18, 2022 in 8th-maths

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The standard form for 203000 is `2.03 xx

asked Jan 18, 2022 in 8th-maths

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Simplify: -1. `(2^5 -: 28) xx

asked Jan 18, 2022 in 8th-maths

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By what number should we multiply `(–29)^0` so that the product becomes

asked Jan 18, 2022 in 8th-maths

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Special balances can weigh something as 0.00000001 gram. Express this number in the standard

asked Jan 18, 2022 in 8th-maths

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A sugar factory has annual sales of 3 billion 720 million kilograms of sugar. Express this number in the standard

asked Jan 18, 2022 in 8th-maths

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The number of red blood cells per cubic millimetre of blood is approximately 5.5 million. If the average body contains 5 litres of blood, what is the total number of red cells in the body? Write the standard form. (1 litre = 1,00,000

asked Jan 18, 2022 in 8th-maths

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Planet A is at a distance of `9.35 xx 10^6` km from Earth and planet B is `6.27 xx 10^7` km from Earth. Which planet is nearer to

asked Jan 18, 2022 in 8th-maths

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The cells of a bacteria double itself every hour. How many cells will there be after 8 hours, if initially we start with 1 cell. Express the answer in

asked Jan 18, 2022 in 8th-maths

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If possible, find a hook-up of prime base number machine that will do the same work as the given stretching machine. Do not use `(xx 1)` machines.

asked Jan 18, 2022 in 8th-maths

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Rs 1600 lent at a compound interest of 5% per annum, compounded half yearly for one year will amount

asked Jan 18, 2022 in 8th-maths

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Arnav buys a book costing Rs 600. If the rate of sales tax is 7%, then the total amount payable by him is Rs

asked Jan 18, 2022 in 8th-maths

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The compound interest on Rs 50,000 at 4% per annum for 2 years compounded annually

asked Jan 18, 2022 in 8th-maths

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A bought a tape recorder for Rs 8,000 and sold it to B. B in turn sold it to C, each earning a profit of 20%. Which of the following is

asked Jan 18, 2022 in 8th-maths

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Discount = _________ –

asked Jan 18, 2022 in 8th-maths

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_________ expenses are the additional expenses incurred by a buyer for an item over and above its cost of

asked Jan 18, 2022 in 8th-maths

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Percentages are _________ to fractions with _________ equal to

asked Jan 18, 2022 in 8th-maths

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By selling an article for Rs 1,12,000 a girl gains 40%. The cost price of the article was

asked Jan 18, 2022 in 8th-maths

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Discount is a reduction given on cost price of an

asked Jan 18, 2022 in 8th-maths

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If the discount of Rs y is available on the marked price of Rs x, then the discount percent is `x/y ´100

asked Jan 18, 2022 in 8th-maths

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