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

Half a number plus 5 is 11. What is the number?

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If the product of the integers from 1 to n is divisible by 378, what is the least possible value of n?

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5n + 2 > 12 and 7n - 5 < 23; n must be between which numbers?

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George is 8 years more than Christopher and Ford is 2 years younger than Christopher.

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A restaurant orders 150 kg of pumpkins from the farmer’s market.

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An empty fuel tank with a capacity of 200 gallons was filled partially with fuel A and then to capacity with fuel B.

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A is twice as good a workman as B and they took 8 days together to do the work B alone can do it in?

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Little John had $7.10. He spent $1.05 on sweets and gave to his two friends $1.00 each.

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If a and b are positive integers of B such that a/b=2.86, which of the following must be a divisor of a?

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30^10 / 180^5=?

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Each factor of 290 is inscribed on its own plastic ball, and all of the balls are placed in a jar.

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A train 100 m long crosses a platform 125 m long in 40 sec; find the speed of the train?

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A certain company reported that the revenue on sales increased 30 % from 2000 to 2003, and increased 80 % from 2000 to 2005.

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A race course is 400m long. A and B run a race and A wins by 5m.

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Each child has 3 crayons and 12 apples.

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Find the average of all the numbers between 6 and 39 which are divisible by 5?

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A bag contains 30 black balls and 20 white balls.

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Smith borrowed some money at the rate of 10% p.a. for the first 2years, at the rate of 12% p.a. for the next three years, and at the rate of 16% p.a. for the period beyond five years.

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A and B began business with Rs.2000 and Rs.4000 after 8 months, A withdraws Rs.1000 and B advances Rs.1000 more.

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In a camp, there is a meal for 120 men or 200 children.

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If f(x) = 5 - 2x, then f -1(-3) = ?

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In a graduating class of 232 students, 144 took geometry and 119 took biology.

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How many seconds will a train 200 meters long running at the rate of 36kmph take to pass a certain telegraph post?

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the radius of the circle is reduced from 5cm to 4cm then the % change of area .

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