Category Archives: math problems

Pig Pens

Thirteen poles enclose six pig pens all of the same size. Question : Can you use 12 poles to enclose six pens all of equal size? Click on picture to see answer Advertisements

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Lucky Number

Magic for you With your back turned, ask a friend to pick a number between 1 and 60. Ask your friend to write this number down on a piece of paper. Tell your friend to flip over the piece of … Continue reading

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Vuvuzelas

To get into the World Cup spirit, I wrote four checks to purchase four vuvuzelas. They are different colored vuvuzelas : yellow, blue, red and black. Each check is for a different amount : $2, $3, $4 and $6. Each … Continue reading

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Lattice Multiplication

Lattice multiplication was introduced to Europe in 1202 in Fibonacci’s Liber Abaci. It is a method of multiplying large numbers using a grid. This method breaks the multiplication process into smaller steps, which some students find easier. Digits to be … Continue reading

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Teaching Math

Teaching Math in 1950: A logger sells a truckload of lumber for $100. His cost of production is 4/5 of the price. What is his profit? Teaching Math in 1960: A logger sells a truckload of lumber for $100. His … Continue reading

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