Recent questions tagged chapter8

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The left column of the chart lists the lengths of input chains of gold. Repeater machines are listed across the top. The other entries are the outputs you get when you send the input chain from that row through the repeater machine from that column. Copy and complete the chart.

asked Jan 18, 2022 in 8th-maths by nikhil (1.8k points)

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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 18, 2022 in 8th-maths by nikhil (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 18, 2022 in 8th-maths by nikhil (1.8k 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 18, 2022 in 8th-maths by nikhil (1.8k 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 18, 2022 in 8th-maths by uday (1.6k 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 18, 2022 in 8th-maths by nikhil (1.8k points)

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By what number should `(–15)^(–1)` be divided so that the quotient may be equal to

asked Jan 18, 2022 in 8th-maths by nikhil (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 18, 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 18, 2022 in 8th-maths by Arun (1.7k 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 18, 2022 in 8th-maths by uday (1.6k 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 18, 2022 in 8th-maths by yogita (1.8k points)

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

asked Jan 18, 2022 in 8th-maths by Arun (1.7k points)

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Simplify:

asked Jan 18, 2022 in 8th-maths by sumit (1.6k points)

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

asked Jan 18, 2022 in 8th-maths by sumit (1.6k points)

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

asked Jan 18, 2022 in 8th-maths by nishit (1.8k points)

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

asked Jan 18, 2022 in 8th-maths by nishit (1.8k 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 18, 2022 in 8th-maths by krutika (1.7k points)

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A picnic is being planned in a school for Class VII. Girls are 60% of the total number of students and are 18 in number. The picnic site is 55 km from the school and the transport company is charging at the rate of Rs 12 per km. The total cost of refreshments will be Rs 4280.Can you

asked Jan 18, 2022 in 8th-maths by nikhil (1.8k points)

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The cost per head if two teachers are also going with the

asked Jan 18, 2022 in 8th-maths by yogita (1.8k points)

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If their first stop is at a place 22 km from the school, what per cent of the total distance of 55 km is this? What per cent of the distance is left to be

asked Jan 18, 2022 in 8th-maths by yogita (1.8k points)

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