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Reverse the Digits

The sum of the two digits of a 2-digit number is 9. If 45 is subtracted from the number, the result will be expressed by the digits in reverse order. Find the number.

Multicultural Classroom Posters Sets 3 & 4
These posters illustrate aspects of the history of mathematics in countries from Babylonia to Ireland.
Silver and Gold

There are two piles, one containing 9 gold coins, the other 11 silver coins.

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