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

Robert tossed a fair coin 3 times.

Two unbiased coins are tossed.

Sara and Alan start a company with Rs.100000 and Rs.50000 respectively. how should they share their profits at the end of one year?

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The radius of a cylindrical water tank is reduced by 50%.

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Dawson sold an item for Rs.3600/- and incurred a loss of 10%.

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There are 5 marbles in a bag - 2 are orange and 3 are blue.

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How many numbers between 10 - 99 yield a reminder of 8 when divided by 10 and also yield a remainder of 2 when divided by 8?

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In how much time will a train of length 100 m, moving at 54 kmph cross an electric pole?

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There are 10 books on a shelf, of which 4 are paperbacks and 6 are hardbacks.

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If an integer n is to be chosen at random from the integers 1 to 84, inclusive, what is the probability that n(n + 1)(n + 2) will be divisible by 8?

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What is the average (arithmetic mean) of all the multiples of ten from 10 to 190 inclusive?

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82*83*84*..89 what is the digit in units place?

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A certain company’s profit in 1996 was 25 percent greater than its profit in 1995, and its profit in 1997 was 30 percent greater than its profit in 1996.

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Average age of students of an adult school is 40 years. 120 new students whose average age is 32 years joined the school.

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A sum of money is sufficient to pay A's wages for 20 days and B's wages for 30 days.

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On a sum of money, the simple interest for 2 years is Rs. 326, while the compound interest is Rs. 340, the rate of interest being the same in both the cases.

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If 2x + 3y = 15; 2y + z = 19 and x + 2z = 29, what is the value of x + y + z ?

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An amount of Rs.3120 was divided among A, B and C, in the ratio 1/2 : 1/3 : 1/4.

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The length of the bridge, which a train 170 meters long and travelling at 45 km/hr can cross in 30 seconds, is:

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A man swims downstream 28 km and upstream 12 km taking 2 hours each time, what is the speed of the man in still water?

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In an election between two candidates, the first candidate got 60% of the votes and the second candidate got 240 votes.

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The volume of a cube is 729 cc.

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A van takes 6 hours to cover a distance of 180 Km. how much should the speed in Kmph be maintained to cover the same direction in 3/2th of the previous time?

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Sides of a triangle are 13 cm.14cm.and 15cm.respectively.calculate the area of triangle.

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