Questions by krutika

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Simplify: -1. `(((-)/2)^(-2))^3 xx (1/3)^(-4) xx 3^(-1) xx

asked Jan 17, 2022 in 8th-maths

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Find the value of x so that `(2^(–1) + 4^(–1) + 6^(–1) + 8^(–1))x =

asked Jan 17, 2022 in 8th-maths

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

asked Jan 17, 2022 in 8th-maths

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Express the product of `3.2 xx 10^6` and `4.1 xx 10^(–1)` 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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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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Investigating Solar System The table shows the average distance from each planet in our solar system to the sun. (a) Complete the table by expressing the distance from each planet to the Sun in scientific

asked Jan 17, 2022 in 8th-maths

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Two machines can be hooked together. When something is sent through this hook up, the output from the first machine becomes the input for the second. (a) Which two machines hooked together do the same work a `( xx 10^2)` machine does? Is there more than one arrangement of two machines that will work? (b) Which stretching machine does the same work as two `(xx 2)` machines hooked together?

asked Jan 17, 2022 in 8th-maths

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For the following repeater machines, how many times the base machine is applied and how much the total stretch is?

asked Jan 17, 2022 in 8th-maths

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A shirt with marked price Rs 800 was sold at Rs 680. The rate of discount allowed on the shirt

asked Jan 17, 2022 in 8th-maths

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If `7/3%` of a number is 42, then the number

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

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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To gain 25% after allowing a discount of 10%, the shopkeeper must mark the price of the article which costs him Rs 360

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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Discount is a reduction given on cost price of an

asked Jan 17, 2022 in 8th-maths

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The value of a car, bought for Rs 4,40,000 depreciates each year by 10% of its value at the beginning of that year. So its value becomes Rs 3,08,000 after three

asked Jan 17, 2022 in 8th-maths

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Sales tax is always calculated on the cost price of an item and is added to the value of the

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

Questions by krutika

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