Question

.... ........ ..........​

Answer 1

$\sqrt{16} = \sqrt{4 \times 4} = 4 \\ \sqrt{64} = \sqrt{8 \times 8} = 8 \\ \sqrt{144} = \sqrt{12 \times 12} = 12 \\ \sqrt{256} = \sqrt{16 \times 16} = 16$

cu drag=)