Category: Math Problems

  • Fly and trains

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    by

    Jaume
    in

    Two trains, 200 km apart, are moving toward each other at the speed of 50 km/hour each. A fly takes off from one train flying straight toward the other at the speed of 75 km/hour. Having reached the other train, the fly bounces off it and flies back to the first train. The fly repeats…

  • Brick weight

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    by

    Jaume
    in

    One brick is one kilogram and half a brick heavy.What is the weight of one brick?