Questions by Simran

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asked Jan 17, 2022 in 8th-maths

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There are 864,00 seconds in a day. How many days long is a second? Express your answer in scientific

asked Jan 17, 2022 in 8th-maths

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What happens when 1 cm worms are sent through these hook-ups?

asked Jan 17, 2022 in 8th-maths

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Sanchay put a 1cm stick of gum through a `(1 xx 3^(–2))` machine. How long was the stick when it came

asked Jan 17, 2022 in 8th-maths

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Shikha has an order from a golf course designer to put palm trees through a `(xx 2^3)` machine and then through a `(xx 3^3)` machine. She thinks she can do the job with a single repeater machine. What single repeater machine should she use?

asked Jan 17, 2022 in 8th-maths

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Neha needs to stretch some sticks to `25^2` times their original lengths, but her `(xx2^5)` machine is broken. Find a hook-up of two repeater machines that will do the same work as a `(xx25^2)` machine. To get started, think about the hookup you could use to replace the `(xx2^5)` machine.

asked Jan 17, 2022 in 8th-maths

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Long back in ancient times, a farmer saved the life of a king’s daughter. The king decided to reward the farmer with whatever he wished. The farmer, who was a chess champion, made an unusal request: “I would like you to place 1 rupee on the first square of my chessboard, 2 rupees on the second square, 4 on the third square, 8 on the fourth square, and so on, until you have covered all 64 squares. Each square should have twice as many rupees as the previous square.” The king thought this to be too less and asked the

asked Jan 17, 2022 in 8th-maths

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A particular star is at a distance of about `8.1 xx 10^13` km from the Earth. Assuring that light travels at `3 xx 10^8` m per second, find how long does light takes from that star to reach the

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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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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Overhead charges, if any, are sometimes included in the cost

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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If amount on the principal of Rs 6,000 is written as 6000 `(1+5/100)^3` and compound interest payable half yearly, then rate of interest p.a. is _________ and time in years is

asked Jan 17, 2022 in 8th-maths

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The cost of a tape-recorder is Rs 10,800 inclusive of sales tax charged at 8%. The price of the tape-recorder before sales tax was charged is

asked Jan 17, 2022 in 8th-maths

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C.P. = M.P. –

asked Jan 17, 2022 in 8th-maths

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Simple interest on a given amount is always less than or equal to the compound interest on the same amount for the same time period and at the same rate of interest per

asked Jan 17, 2022 in 8th-maths

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The cost of a sewing machine is Rs 7,000. Its value depreciates at 8% p.a. Then the value of the machine after 2 years is Rs

asked Jan 17, 2022 in 8th-maths

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In a factory, women are 35% of all the workers, the rest of the workers being men. The number of men exceeds that of women by 252. Find the total number of workers in the

asked Jan 17, 2022 in 8th-maths

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