To work out the square root of sqrt(10000). This means we need to calculate sqrt(10000).

The question asks to work out the square root of $\sqrt{10000}$. This means we need to calculate $\sqrt{\sqrt{10000}}$.
First, we find the value of the inner square root:

$$\sqrt{10000}$$

Since $100 \times 100 = 10000$, we have:

$$\sqrt{10000} = 100$$

Now, we take the square root of the result from Step 1:

$$\sqrt{100}$$

Since $10 \times 10 = 100$, we have:

$$\sqrt{100} = 10$$

The final answer is $\boxed{10}$.

Question 16 is incomplete. It states "A housing company bought 8112 iron sheets from 100" but does not ask a question or provide enough information to perform a calculation.