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Puzzle 1 - Maths 1 - Level of difficulty: Easy

Starting in the top left corner and finishing in the bottom right, click on the squares to find the hidden green path. Beware - a mistake will take you back to the start.
There's a hint at the bottom of the page.

For more information on the maths behind this puzzle,
see Simon Singh's 5 Numbers pages below.

    >>>> Puzzle 2: Maths 2 >>>>

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Hint: Try a little addition.
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