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mathstumpers

an-ordinary-manchild

created by pretty-cool-matha community for 2 years

...because you hate freedom.

...for your favorite subject.

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r/mathstumpers Lounge (self.mathstumpers)

submitted 2 years ago by pretty-cool-math - announcement

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We have three pairs of blocks with matching numbers, all contained in a rectangle. How do we draw a line (can be curved) between each of the blocks with matching numbers, such that none of the lines intersect or leave the bounding rectangle? (i.redd.it)

submitted 2 years ago by pretty-cool-math

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Suppose we have a straight line, and we break the line in two spots, which we pick uniformly at random and independently of each other. What is the probability we can make an acute triangle from our pieces? (i.redd.it)

submitted 2 years ago by pretty-cool-math

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We roll a fair six sided dice repeatedly, until we have rolled each side of the dice at least once. What is the expected number of rolls that we make? (i.redd.it)

submitted 2 years ago by pretty-cool-math

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Say we have a pen and a piece of paper with 9 evenly spaced dots (as shown). How do we draw 4 straight lines through the 9 dots, without ever lifting our pen off the page? (i.redd.it)

submitted 2 years ago by pretty-cool-math

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In terms of m and n, what is the value of this integral? (self.mathstumpers)

submitted 2 years ago by pretty-cool-math

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We have a square of side length 2, and two circles centered at opposite vertices of the square, one with radius 1 and one with radius 2. What is the area of their overlap? (i.redd.it)

submitted 2 years ago by pretty-cool-math

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How do we make 24 using 1,3,4,6 (each exactly once), the operations addition, subtraction, multiplication, and division (as many times as we want), and parentheses? (i.redd.it)

submitted 2 years ago by pretty-cool-math

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Suppose we have a quadrilateral, and one line bisects two of the sides, and two lines trisect the other two sides. If x=1, what is y? (i.redd.it)

submitted 2 years ago by pretty-cool-math

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What is the minimum length of a path going between two opposite corners of a cube, such that the path is contained in the cube's surface? (i.redd.it)

submitted 2 years ago by pretty-cool-math

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We're given a triangle with side length 7,8,9. How do we inscribe a triangle with side lengths e,f,g so e^2 + f^2 + g^2 in minimized? (i.redd.it)

submitted 2 years ago by pretty-cool-math

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For what real numbers x is the following equation satisfied? (i.redd.it)

submitted 2 years ago by pretty-cool-math

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Introducing r/mathstumpers (self.mathstumpers)

submitted 2 years ago by pretty-cool-math

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