Q&Answers: Math/Chemistry/Physics Problems + Solutions

At a certain school 25% of the students join a band, 25% play a sport and 20% both join the band and play a sport. if a randomly selected student is a member of the band, what is the probablility that the student also plays a sport?

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What is the units digit of 18!

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A 14 meter long wire is cut into two pieces.

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Two trains are moving in opposite directions at 60 km/hr and 90 km/hr.

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What is the speed required for a bike to cover a distance of 720 km in 12 hours?

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If a positive integer n is divisible by both 2 and 5, then n must also be divisible by which of the following?

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The list price of an article is Rs.70.

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In a party attended by 9 persons, each clinch their glass with every other.

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Which of the following triples of numbers have the same standard deviation as the numbers p, q, and r?

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5.40 can be expressed in terms of percentage as

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What is the rate percent when the simple interest on Rs.780 amount to Rs.130 in 4 Years?

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Find the fourth proportion to 2,3,6

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Sekar started a business investing Rs.25,000 in 1999.

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If 15 machine can finish a job in 36 days, then how many more machines would be needed to finish the job in one -fourth less time?

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If k is a multiple of 3 and k=(m2)nk=(m2)n, where m and n are prime numbers, which of the following must be a multiple of 9?

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A car gets 40 kilometers per gallon of gasoline.

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A series of number is given: 5, 6, 12, 5, 7, 13, 5,__14, 5, 9, 15..

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A, B and C start a business each investing 2,000.

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A worker is paid x rupees for painting every 5 metres of a wall and y rupees for painting every extra metre.

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If x is a positive, single-digit integer such that 2/3*x, 2x, x, and x + 2, and 3x – 2 form a non-ordered list of consecutive integers, which of the following could be the median of that list?

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If |4x+10| = 46, what is the sum of all the possible values of x?

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If each side of a rectangle is increased by 50% with the length being double the width, find the percentage change in its area?

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A rope of which a calf is tied is increased from 12 m to 21 m, how much additional grassy ground shall it graze?

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How many seconds will a 400 meter long train take to cross a man walking with a speed of 3 km/hr in the direction of the moving train if the speed of the train is 63 km/hr?

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