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Using `a^2 – b^2 = (a + b) (a – b)`, find `153^2 –

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

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Can a polyhedron have 10 faces, 20 edges and 15

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

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Mrs. Kaushik has a square plot with the measurement as shown in the figure. She wants to construct a house in the middle of the plot. A garden is developedaround the house. Find the total cost of developing a garden around the house at the rate of Rs 55 per

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

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The area of a trapezium shaped field is 480 `m^2` , the distance between two parallel sides is 15 m and one of the parallel side is 20 m. Find the other parallel

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

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Simplify and write the answer in the exponential form. `(– 4)^(– 3) xx (5)^(– 3) xx

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

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Express the following numbers in usual form. `3.52 xx

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

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Express the following numbers in usual form. `3.02 xx 10^(– 6)`

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

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Express the number appearing in the following statements in standard form. 1 micron is equal to `1/(1000000)`

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

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A photograph of a bacteria enlarged 50,000 times attains a length of 5 cm as shown in the diagram. What is the actual length of the bacteria? If the photograph is enlarged 20,000 times only, whatwould be its enlarged

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

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Which of the following are in inverse proportion?(i) The number of workers on a job and the time to complete the job.(ii) The time taken for a journey and the distance travelled in a uniform speed.(iii) Area of cultivated land and the crop harvested.(iv) The time taken for a fixed journey and the speed of the vehicle.(v) The population of a country and the area of land per

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

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Rehman is making a wheel using spokes. He wants to fix equal spokes in such a way that the angles between any pair of consecutive spokes are equal. Help him bycompleting the following table. sss 8 → 45°, 10 → 36°, 12 → 30° sss Are the number of

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

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If a box of sweets is divided among 24 children, they will get 5 sweets each. How many would each get, if the number of the children is reduced by

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

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Verify the following: `(5x + 8)^2 – 160x = (5x –

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

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`[(2/13)^(-1) -: (2/13)^3]^3 xx (2/13)^(-13)` =

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

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The standard form for 32,50,00,00,000 is

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

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The standard form for 0.000037 is `3.7 xx

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

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If `(5^m xx 5^3 xx 5^(-2))/5^-5 = 5^12`, find

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

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Discount is a reduction given on cost price of an

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

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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 by nikhil (1.8k points)

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