Questions by nikhil

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Find the product of the cube of (–2) and the square of

asked Jan 17, 2022 in 8th-maths

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Simplify: -1. `(2^5 -: 28) xx

asked Jan 17, 2022 in 8th-maths

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

asked Jan 17, 2022 in 8th-maths

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Find the multiplicative inverse of `(–7)^(–2) -:

asked Jan 17, 2022 in 8th-maths

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`(125 xx x^(-3))/(5^(-3) xx 25 xx

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

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Use the properties of exponents to verify that each statement is true. (a) `1/4(2^n) = 2^(n-2)` (b) `4(n-1) = 1/4(4)^n` (c) `25(5^(n–2)) =

asked Jan 17, 2022 in 8th-maths

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Fill in the blanks

asked Jan 17, 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 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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Ajay had a 1cm piece of gum. He put it through repeater machine given below and it came out `1/100,000 cm` long. What is the missing value?

asked Jan 17, 2022 in 8th-maths

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If a = – 1, b = 2, then find the value of the following: (1) `a^b + b^a` (2) `a^b – b^a` (3) `a^b xx b^2` (4) `a^b ¸

asked Jan 17, 2022 in 8th-maths

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Express each of the following in exponential form: (1) `(-1296)/14641` (2) `(-125/343)` (3) `400/3969` (4)

asked Jan 17, 2022 in 8th-maths

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Arnav buys a book costing Rs 600. If the rate of sales tax is 7%, then the total amount payable by him is Rs

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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Sales tax = tax % of

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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5% sales tax is charged on an article marked Rs 200 after allowing a discount of 5%, then the amount payable 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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If the discount of Rs y is available on the marked price of Rs x, then the discount percent is `x/y ´100

asked Jan 17, 2022 in 8th-maths

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