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

The average weight of 10 persons increases by 7.2 kg when a new person comes in place of one of them weighing 65 kg.

A room is half as long again as it is broad.

If X is invested in a bank at a rate of simple interest of y% p.a. for two years, then the interest earned is 900. if X is invested at y% p.a., for two years when the interest is compounded annually, the interest is 922.50.

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Walking at 1/3th of its usual speed a cab is 20mnts late.

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If n is an integer and n^4 is divisible by 10, which of the following could be the remainder when n is divided by 10?

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If a sum on compound interest becomes three times in 4 years, then with the same interest rate, the sum will become 81 times in:

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15.06 * 0.00000001 = ?

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Jansi went out for shopping. She had in her handbag approximately Rs. 15/- in one rupee notes and 20 p. coins.

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If d is a number such that –2 ≤ d ≤ 2, which of the following has the largest possible absolute value?

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The smallest prime factor of 899 is xx.

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In a house a hall is 20 m long, 15m wide and 5m high.

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220, 218, 214, 208, 200, 190, ?

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The total marks obtained by a student in Mathematics and Physics is 20 and his score in Chemistry is 20 marks more than that in Physics.

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If f(x) = k(x - k) and k is a constant, what is the value of f(4) - f(2), in terms of k?

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What is the area of a triangle with the following vertices L(1, 2), M(5, 1), and N(3, 5) ?

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Different breeds of dogs get older at different rates in “dog years.”

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A sum of Rs. 3000 amounts to Rs. 9000 in 4 years at the rate of simple interest.

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Train A and Train B began traveling towards each other from opposite ends of a 420-mile long track at 1:00 PM.

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A constructor estimates that 8 people can paint Mr khans house in 3 days.

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There are two cars. One is 100 miles north of the other.

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The owner of a furniture shop charges his customer 24% more than the cost price.

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Find a positive number which when increased by 17 is equal to 60 times the reciprocal of the number.

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A goods train runs at the speed of 72 km/hr and crosses a 250 m long platform in 22 sec.

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nd the area of trapezium whose parallel sides are 20 cm and 16 cm long, and the distance between them is 15 cm?

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