Question

Find the square root of 6400 using prime factorization method. [2 MARKS]

Answer 1

Prime factorisation : 1 Mark
Conclusion : 1 Mark

$6400=2\times 2\times 2\times 2\times 2\times 2\times 2\times 2\times 5\times 5$

Thus, $\sqrt{6400}=2\times 2\times 2\times 2\times 5=80$