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

A car dealership sold two cars: the first car at a 10% profit and the second car at a 10% loss, which gave them an overall profit margin of 5% from these two sales.

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One year ago, the ratio of Gaurav’s and Sachin’s age was 6: 7 respectively.Four years hence, this ratio would become 7: 8.

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If 2x+3y+z=55,x-y=4 and y - x + z=12,then what are the values of x , y and z?

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A man sitting in a train which is travelling at 50 kmph observes that a goods train, travelling in opposite direction, takes 9 seconds to pass him.

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A local bank that has 8 branches uses a two-digit code to represent each of its branches.

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If there are 4 peanuts in a box and Mary puts 4 more peanuts inside, how many peanuts are in the box?

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A package contains 8 black and 14 white balls.

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At what time between 5.30 and 6 will the hands of a clock be at right angles?

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Each customer of a networking company subscribes to one of two plans: Plan A or Plan B.

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The annual budget of a certain college is to be shown on a circle graph.

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If a company allocates 25 percent of its budget to advertising, 15 percent to capital improvements, and 55 percent to salaries, what fraction of its budget remains for other allocations?

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From a group of 4 boys and 4 girls, 6 children are to be randomly selected.

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A man is walking at a speed of 6 km per hour.

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Average of all prime numbers between 20 to 50

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If the number 52,1n9, where n represents the tens digit, is a multiple of 3, then the value of n could be which of the following?

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A train 500 m long passed a pole in 50 sec.

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A box contains 15 mangoes out of which 8 are spoilt.

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If a is a positive integer, and if the units digit of a^2 is 9 and the units digit of (a+1)^2 is 4, what is the units digit of (a+2)^2?

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Simplify: 3005-3000+10

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Mixture A is 40 percent alcohol, and mixture B is 80 percent alcohol.

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Find the cost of fencing around a circular field of diameter 20 m at the rate of Rs.1.50 a meter?

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If xy=1, x/y=36, for positive numbers x and y, y=?

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A can contains a mixture of liquids A and B is the ratio 7:5.

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Two pipes a and b can fill a tank in 12 hours and 15 hours respectively.if both pipe open together in tank,then how much time it take to fill the tank?

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