Math Arguments

Problems, Questions, and Puzzles to spark discussion and argument in the maths classroom.

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Digits in Fibonacci

We all recognize the Fibonacci Sequence:  1, 1, 2, 3, 5, 8, 13, 21, ...
What is the units digit of the sixty-first Fibonacci number?

Is there a pattern?


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Number Theory
James Tanton
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Source: James Tanton
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