Questions by Arun

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Find the value of x so that `(5/3)^(-3) xx (5/3)^(-14) =

asked Jan 18, 2022 in 8th-maths

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Some migratory birds travel as much as 15,000 km to escape the extreme climatic conditions at home. Write the distance in metres using scientific

asked Jan 18, 2022 in 8th-maths

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Find x so that `(2/9)^3 xx (2/9)^(-6) =

asked Jan 18, 2022 in 8th-maths

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Predicting the ones digit, copy and complete this table and answer the questions that follow. (a) Describe patterns you see in the ones digits of the

asked Jan 18, 2022 in 8th-maths

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This table shows the mass of one atom for five chemical elements. Use it to answer the question given. Element Mass of atom (kg) TitaniumLeadSilverLithiumHydrogen `7.95 × 10^(–26)` `3.44 × 10^(–25) ``1.79 × 10^(–25)``1.15 × 10^(–26)``1.674 × 10^(–27) `

asked Jan 18, 2022 in 8th-maths

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This table shows the mass of one atom for five chemical elements. Use it to answer the question given. Element Mass of atom (kg) TitaniumLeadSilverLithiumHydrogen `7.95 × 10^(–26)` `3.44 × 10^(–25) ``1.79 × 10^(–25)``1.15 × 10^(–26)``1.674 × 10^(–27) `

asked Jan 18, 2022 in 8th-maths

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The volume of the Earth is approximately `7.67 xx 10^(–7)` times the volume of the Sun. Express this figure in usual

asked Jan 18, 2022 in 8th-maths

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Stretching Machine Suppose you have a stretching machine which could stretch almost anything. For example, if you put a 5 metre stick into a `(xx 4)` stretching machine (as shown below), you get a 20 metre stick. Now if you put 10 cm carrot into a `(xx 4)` machine, how long will it be when it comes out?

asked Jan 18, 2022 in 8th-maths

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

asked Jan 18, 2022 in 8th-maths

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Find a single machine that will do the same job as the given hook-up. (a) a`(xx 2^3)` machine followed by `(xx 2^(–2))` machine. (b) a`(xx 2^4)` machine followed by `(xx(1/2)^2)` machine (c) a`(xx 5^99)` machine followed by a `(5^(–100))`

asked Jan 18, 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 18, 2022 in 8th-maths

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

asked Jan 18, 2022 in 8th-maths

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Increase of a number from 150 to 162 is equal to increase of _________ per

asked Jan 18, 2022 in 8th-maths

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15% increase in price of an article, which is Rs 1,620, is the increase of Rs

asked Jan 18, 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 18, 2022 in 8th-maths

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In Delhi University, in the year 2009 – 10, 49,000 seats were available for admission to various courses at graduation level. Out of these 28,200 seats were for the students of General Category while 7,400 seats were reserved for SC and 3,700 seats for ST. Find the per centage of seats available for

asked Jan 18, 2022 in 8th-maths

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Prachi bought medicines from a medical store as prescribed by her doctor for Rs 36.40 including 4% VAT. Find the price before VAT was

asked Jan 18, 2022 in 8th-maths

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If principal = Rs 1,00,000. rate of interest = 10% compounded half yearly. Find Amount after 6

asked Jan 18, 2022 in 8th-maths

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If principal = Rs 1,00,000. rate of interest = 10% compounded half yearly. Find Amount after one

asked Jan 18, 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 18, 2022 in 8th-maths

Questions by Arun

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