When working on mathematical tasks, you may sometimes discover unexpected results that take you by surprise. In this feature, we have chosen some problems that we hope will astonish and amaze you.
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problem
Legs eleven
Take any four digit number. Move the first digit to the end and move the rest along. Now add your two numbers. Did you get a multiple of 11?
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problem
Triangle in a triangle
Can you work out the fraction of the original triangle that is covered by the inner triangle?
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problem
Areas and ratios
Do you have enough information to work out the area of the shaded quadrilateral?
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problem
Another triangle in a triangle
Can you work out the fraction of the original triangle that is covered by the green triangle?
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