Make a factor tree for 16
16 ∧ 4 X 4 ∧ ∧ 2 X 2 2 X 2The answer is 2 x 2 x 2 x 2 or 2⁴ This would have worked as well had you broken down 16 into 8 x 2. You would get the same answer as the 8 would break down into 4 x 2 and the 4 would break down into 2 x 2.
