Questions by nikhil

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Express `(1.5 xx 10^6)/(2.5 xx 10^(-6))` in the standard

asked Jan 17, 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 17, 2022 in 8th-maths

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The cells of a bacteria double in every 30 minutes. A scientist begins with a single cell. How many cells will be there after (a) 12 hours (b) 24

asked Jan 17, 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 17, 2022 in 8th-maths

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An insect is on the 0 point of a number line, hopping towards 1. She covers half the distance from her current location to 1 with each hop. So, she will be at `1/2` after one hop, `3/4` after two hops, and so on. (a) Make a table showing the insect’s location for the first 10

asked Jan 17, 2022 in 8th-maths

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Find three repeater machines that will do the same work as a `(xx64)` machine. Draw them, or describe them using

asked Jan 17, 2022 in 8th-maths

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By what number should `(–15)^(–1)` be divided so that the quotient may be equal to

asked Jan 17, 2022 in 8th-maths

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Find x -1. (1) `-(1/7)^(-5) -: -(1/7)^(-7) = (-7)^x` (2) `(2/5)^(2x+6) xx (2/5)^3 =

asked Jan 17, 2022 in 8th-maths

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If the cost price of 10 shirts is equal to the selling price of 8 shirts, then which of the following is true for the

asked Jan 17, 2022 in 8th-maths

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By selling 50 pens, a shopkeeper lost the amount equal to the selling price of 10 pens. His loss per cent is

asked Jan 17, 2022 in 8th-maths

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When the interest is compounded half yearly, the number of conversion periods in a year is

asked Jan 17, 2022 in 8th-maths

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A number is increased by 20% and then it is decreased by 20%. Find the net increase or decrease per

asked Jan 17, 2022 in 8th-maths

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Vishakha offers a discount of 20% on all the items at her shop and still makes a profit of 12%. What is the cost price of an article marked at Rs

asked Jan 17, 2022 in 8th-maths

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Suppose for the principal P, rate R% and time T, the simple interest is S and compound interest is C. Consider the

asked Jan 17, 2022 in 8th-maths

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The marked price of an article is Rs 80 and it is sold at Rs 76, then the discount rate

asked Jan 17, 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 17, 2022 in 8th-maths

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A sum is taken for two years at 16% p.a. If interest is compounded after every three months, the number of times for which interest is charged in 2 years

asked Jan 17, 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 17, 2022 in 8th-maths

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The loss per cent on selling 140 geometry boxes at the loss of S.P. of 10 geometry boxes is equal to

asked Jan 17, 2022 in 8th-maths

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Abida bought 100 pens at the rate of Rs 3.50 per pen and pays a sales tax of 4%. The total amount paid by Abida is

asked Jan 17, 2022 in 8th-maths

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