State whether the following numbers are perfect squares:
Evaluate the following:
Harry was working out 2^{2} \times 5^{2} and thought that he could simplify the expression using the fact that 2 \times 5 = 10.
Evaluate 2^{2} \times 5^{2}, by first expanding and evaluating each square.
Now, using the fact 2 \times 5 = 10, evaluate 10^{2}.
Is 2^{2} \times 5^{2} = \left( 2 \times 5\right)^{2} a true statement?
Calculate 4^{2} \times 2^{2} using the above method.
Given that we know 5 \times 5 = 25. What is \sqrt{25}?
Evaluate the following: