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

A box contains nine bulbs out of which 4 are defective.

A conference is to have eight presentations over the course of one day, consisting of three long presentations, and five short presentations.

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The ratio, in which tea costing Rs. 192 per kg is to be mixed with tea costing Rs. 150 per kg so that the mixed tea when sold for Rs.

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Find the area of circle whose radius is 10m?

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Solve the following quadratic equation by factoring.

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A rectangular parking space is marked out by painting three of its sides.

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To a sugar solution of 3 litres containing 40% sugar, one litre of water is added.

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y = x2 + bx + 256 cuts the x axis at (h, 0) and (k, 0).

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If air is called green , green is called blue, blue is called purple, sky is called yellow, yellow is called water and water is called pink, then what is the color of clear sky ?

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According to the directions on a packet of smoothie mix, 1 3-ounce packet of smoothie mix is to be combined with 10 ounces of water to make a smoothie.

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If n is a positive integer and the greatest common divisor of n and 16 is 4, and the greatest common divisor of n and 15 is 3, which of the following is the greatest common divisor of n and 204?

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Rs. 1581 is divided among A, B and C in the ratio 10 : 15 : 6.

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If x/y is an integer, which of the following must also be an integer?

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If a person walks at 14 km/hr instead of 10 km/hr, he would have walked 20 km more.

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Rs. 6500 is divided into three parts A, B and C.

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Ravi can do a piece of work in 15 days while Prakash can do it in 6 days.

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The Shopkeeper increased the price of a product by 25% so that customer finds it difficult to purchase the required amount.

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A bottle contains a certain solution.

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A certain car uses one gallon of gasoline every 32 miles when it travels on highway, and one gallon of gasoline every 20 miles when it travels in the city.

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In an examination a pupil's average marks were 63 per paper.

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120 is what percent of 50 ?

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A rectangular field is to be fenced on three sides leaving a side of 20 feet uncovered.

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If the simple interest on $2000 increase by $40,when the time increase by 4 years.

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If the cost price is 90% of the selling price, then what is the profit percent?

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