Questions by vaibhav

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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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For each hook-up, determine whether there is a single repeater machine that will do the same work. If so, describe or draw it (a) (b) (c) (d)(e)

asked Jan 17, 2022 in 8th-maths

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Supply the missing information for each diagram. (a) (b) (c) (d)

asked Jan 17, 2022 in 8th-maths

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The diameter of the Sun is `1.4 xx 10^9` m and the diameter of the Earth is `1.2756 xx 10^7` m. Compare their diameters by

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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40% of [100 – 20% of 300] is equal

asked Jan 17, 2022 in 8th-maths

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2500 is greater than 500 by

asked Jan 17, 2022 in 8th-maths

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Four times a number is a _________ % increase in the

asked Jan 17, 2022 in 8th-maths

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A watch worth Rs 5400 is offered for sale at Rs 4,500. What per cent discount is offered during the

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

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A lady buys some pencils for Rs 3 and an equal number for Rs 6. She sells them for Rs 7. Find her gain or

asked Jan 17, 2022 in 8th-maths

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A student used the proportion `n/100 = 5/32`to find 5% of 32. What did the student do

asked Jan 17, 2022 in 8th-maths

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If the cost of 10 pencils is Rs 90, then the cost of 19 pencils is Rs

asked Jan 17, 2022 in 8th-maths

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If 5 persons can finish a job in 10 days then one person will finish it in 2

asked Jan 17, 2022 in 8th-maths

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Under the condition that the temperature remains constant, the volume of gas is inversely proportional to its pressure. If the volume of gas is 630 cubic centimetres at a pressure of 360 mm of mercury, then what will be the pressure of the gas if its volume is 720 cubic centimetres at the same

asked Jan 17, 2022 in 8th-maths

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Which of the following vary inversely with each

asked Jan 17, 2022 in 8th-maths

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Both x and y are in direct proportion, then `1/x` and `1/y`

asked Jan 17, 2022 in 8th-maths

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If two quantities p and q vary inversely with each other,

asked Jan 17, 2022 in 8th-maths

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Both x and y vary directly with each other and when x is 10, y is 14, 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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If x = 5y, then x and y vary ______ with each

asked Jan 17, 2022 in 8th-maths

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