What fraction of this rectangle has been shaded black?
What fraction of this circle has been shaded red?
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Teacher, do your students have
access to computers?
Here a concise URL for a version of this page without the comments.
Here is the URL which will take them to a traditional fractions online exercise.
How many pizzas?
Make up a mathematical question about this hypnotic design.
The hypnotic design above was adapted from code made available by Emma http://chilliconcode.com/uncategorised/hypnoctic-css-spinning-illusion/