Some coins were arranged in a row.
Half of them were tails up.
Two of the coins are turned over and now one third of them are tails up.
How many coins were in the row?
Teacher: Here is a visual aid to use if required. Coins can be dragged and, to turn them over, doubleclick.
Have a guess!
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Teacher, do your students have
access to computers?
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Do you think a fraction wall might help with this puzzle?