Distance Time

A cargo plane flew from the Clark across the Pacific at 255 kph and flew back to the Clark at 275 kph. Given that the first trip took 2...
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One dimensional collision

A 1200kg car traveling initially at 25m/s in an eastern direction crashed into the back of a 9000kg truck moving at the same direction at 20m/s. The velocity of...
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Largest possible sum

In the year 2001, the International Mathematics Olympiad was held in the USA. Let be distinct positive integers such that the product I * M * O =...
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Age problem-2

One number is 3 times another number. If the larger number is diminished by 8, the resultant is 7 more than twice the smaller number. Find the numbers.
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Statistics-Mean

In computing a mean of 8 numbers, a boy mistakenly used 17 instead of 25 as one of the numbers and obtained 20 as mean. Find the correct ...
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