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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 by yogita (1.8k points)

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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 by vaibhav (1.7k points)

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Mass of Mars is `6.42 xx 10^29` kg and mass of the Sun is `1.99 xx 10^30` kg. What is the total

asked Jan 17, 2022 in 8th-maths by Arun (1.7k points)

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The distance between the Sun and the Earth is `1.496 xx 10^8` km and distance between the Earth and the Moon is `3.84 xx 10^8` m. During solar eclipse the Moon comes in between the Earth and the Sun. What is distance between the Moon and the Sun at that particular

asked Jan 17, 2022 in 8th-maths by nikhil (1.8k points)

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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 by vaibhav (1.7k points)

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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 by nishit (1.8k points)

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By what number should `(–8)^(–3)` be multiplied so that that the product may be equal to

asked Jan 17, 2022 in 8th-maths by uday (1.6k points)

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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 17, 2022 in 8th-maths by nikhil (1.8k points)

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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 by Simran (1.8k points)

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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 by Simran (1.8k points)

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

asked Jan 17, 2022 in 8th-maths by purvi (1.8k points)

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Simplify:

asked Jan 17, 2022 in 8th-maths by purvi (1.8k points)

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Simplify: `(4/13)^4 xx (13/7)^2 xx

asked Jan 17, 2022 in 8th-maths by purvi (1.8k points)

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Simplify: `(1/5)^45 xx (1/5)^(-60) - (1/5)^+28 xx

asked Jan 17, 2022 in 8th-maths by yogita (1.8k points)

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Simplify: `((9) xx 27 xx t^4)/((3)^(-2) xx (3)^4 xx

asked Jan 17, 2022 in 8th-maths by sumit (1.6k points)

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Simplify: `((3^-2)^2 xx (5^2)-3 xx (t^(-3))^2)/((3^(-2))^5 xx (5^3)^(-2) xx

asked Jan 17, 2022 in 8th-maths by nishit (1.8k points)

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Babita bought 160 kg of mangoes at Rs 48 per kg. She sold 70% of the mangoes at Rs 70 per kg and the remaining mangoes at Rs 40 per kg. Find Babita’s gain or loss per cent on the whole

asked Jan 17, 2022 in 8th-maths by sumit (1.6k points)

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A shopkeeper was selling all his items at 25% discount. During the off season, he offered 30% discount over and above the existing discount. If Pragya bought a skirt which was marked for Rs 1,200, how much did she pay for

asked Jan 17, 2022 in 8th-maths by sumit (1.6k points)

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Ayesha announced a festival discount of 25% on all the items in her mobile phone shop. Ramandeep bought a mobile phone for himself. He got a discount of Rs 1,960. What was the marked price of the mobile

asked Jan 17, 2022 in 8th-maths by purvi (1.8k points)

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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 17, 2022 in 8th-maths by Arun (1.7k points)

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