Questions by Arun

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asked Jan 17, 2022 in 8th-maths

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Express `27/64` and `(-27)/64` as powers of a rational

asked Jan 17, 2022 in 8th-maths

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Simplify: -1. `(1/4)^(-2) + (1/2)^(-2) +

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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Repeater Machine Similarly, repeater machine is a hypothetical machine which automatically enlarges items several times. For example, sending a piece of wire through a `(xx 2^4)` machine is the same as putting it through a (xx 2) machine four times. So, if you send a 3 cm piece of wire through a `(xx 2^4)` machine, its length becomes `3 xx 2 xx 2 xx 2 xx 2 = 48` cm. It can also be written that a base (2) machine is being applied 4 times. What will be the new length of a 4 cm strip inserted in

asked Jan 17, 2022 in 8th-maths

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In a repeater machine with 0 as an exponent, the base machine is applied 0 times. (a) What do these machines do to a piece of chalk? (b) What do you think the value of 60

asked Jan 17, 2022 in 8th-maths

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Mass of Mars is `6.42 xx 10^29` kg and mass of the Sun is `1.99 xx 10^30` kg. What is the total

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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Ashima took a loan of Rs 1,00,000 at 12% p.a. compounded half yearly. She paid Rs 1,12,360. If (1.06)2 is equal to 1.1236, then the period for which she took the loan

asked Jan 17, 2022 in 8th-maths

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Compound interest is the interest calculated on the previous year’s

asked Jan 17, 2022 in 8th-maths

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A man purchased a bicycle for Rs 1,040 and sold it for Rs 800. His gain per cent is

asked Jan 17, 2022 in 8th-maths

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In case of gain, S.P. = `((100+gai

asked Jan 17, 2022 in 8th-maths

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If principal = Rs 1,00,000. rate of interest = 10% compounded half yearly. Find Interest for next 6

asked Jan 17, 2022 in 8th-maths

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Find the difference between Compound Interest and Simple Interest on Rs 45,000 at 12% per annum for 5

asked Jan 17, 2022 in 8th-maths

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What is the percentage increase or decrease in the number of seats won by A, B, C and D in the general elections of 2009 as compared to the results of 2004? Political party Number of seats wonin 2004 Number of seats wonin 2009 ABCD 206116411 1451382412

asked Jan 17, 2022 in 8th-maths

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When two quantities x and y are in inverse proportion, then `x/y` is a

asked Jan 17, 2022 in 8th-maths

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Both x and y vary inversely with each other. When x is 10, y is 6, which of the following is not a possible pair of corresponding values of x and

asked Jan 17, 2022 in 8th-maths

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Assuming land to be uniformly fertile, the area of land and the yield on it

asked Jan 17, 2022 in 8th-maths

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In which of the following case, do the quantities vary directly with each

asked Jan 17, 2022 in 8th-maths

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When two quantities x and y are in ______ proportion or vary ______ they are written as `x prop

asked Jan 17, 2022 in 8th-maths

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