What is the point of intersection of the heights of a triangle called?
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What is the point of intersection of the heights of a triangle called?
What is the locus of points on the plane equidistant from a fixed point?
Descobre o nome de 5 dos 7 matemáticos escritos no quadro. Find out the names of 5 of the 7 mathematicians written on the board.
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What is the result?
Sudoku
At my friend Gauss's house we were offered a new variety of sudoku games. It is a matter of placing the numbers from 1 to 6 arranged in rows and columns without repeating them, so that the numbers of two places that share a black dot are double each other and those that share a white dot are consecutive numbers. They may complete this special sudoku?
Meias e Luvas!
Socks and Gloves! Meias e Luvas!
Miguel keeps his socks and gloves in a drawer in his wardrobe. There are six pairs of blue socks, five pairs in green socks, four pairs of black gloves and three pairs of gray gloves. Unfortunately the drawer is quite untidy and the several pieces are all mixed together. One winter morning, it was still dark and the light. Miguel needed a pair of socks and another one for gloves, but, due to the cold, his hands were frozen and I couldn’t tell a sock from a glove. What is the least number of pieces he has to take out of drawer to make sure you have a pair of matching socks and another with gloves of the same color?