1. Number

Middle Years

Consider the following prime factorisations:

$180=2\times2\times3\times3\times5$180=2×2×3×3×5

$600=2\times2\times2\times3\times5\times5$600=2×2×2×3×5×5

Find the highest common factor of $180$180 and $600$600.

Easy

Approx 2 minutes

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