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

A coin is flipped twice.What is the probability that both flips result in heads given that first flip does?

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A shopkeeper sold an book offering a discount of 5% and earned a profit of 33%.

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A number exceeds by 15 from its 3/8 part.

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A 300 m long train crosses a platform in 39 sec while it crosses a signal pole in 14 sec.

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Circles X and Y are concentric.

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From the beginning to the end of 2007, the price of a stock rose 20 percent.

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How many Kg of rice at Rs.6.60 per Kg. be mixed with 56Kg of rice at Rs.9.60 per Kg to get a mixture

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Out of first 20 natural numbers, one number is selected at random.

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A one-foot stick is marked in 1/2 and 1/4 portion.

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Find a two digit number, given that the sum of the digits is 13 and the difference of the digits is 5.?

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john bought a computer for $2,000 and then paid a 5 percent sales tax, and Henry bought a computer for $1,800 and then paid a 12 percent sales tax.

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In how many ways can 5 boys and 2girls be arranged ata table if 2 girls are never together?

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When working alone, painter W can paint a room in 2 hours, and working alone, painter X can paint the same room in h hours.

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The L.C.M. of 2 numbers is 54.

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Set A contains all the even numbers between 22 and 70 inclusive.

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Rahul's Mathematics test had 75 problems, 10 arithmetic, 30 algebra, 35 geometry problems.

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If ABC is a quarter circle and a smaller circle is inscribed in it; if radius of quarter circle is 1.414units.

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N is a positive integer.

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Two isosceles Triangles have equal vertical angles and their areas are in the ratio 25:49.

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On dividing a number by 7, we get 3 as quotient and 0 as remainder.

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