Mathematics Puzzle Template

There is a type of Mathematical Puzzle that follows the template shown in Figure 1.

Figure 1

The puzzle above isn't too difficult to solve once one realises that the numbers in three out of the four inner quadrants are formed from the two numbers in the corresponding outer part of the quadrant by the formula: $$\text{inner number = (larger number - smaller number)}^3$$ Thus the missing number is calculated as follows: $$\begin{align} (8 - 2)^3 &= 6^3\\ &=216 \end{align}$$ Removing the numbers from Figure 1 we are left with the (rather crude) template shown in Figure 2.

Figure 2

Using this template, it's easy to come up with other puzzles such as the one shown in Figure 3.

Figure 3

Here the solution lies in the fact that:

$$\text{inner number = (larger number + smaller number) mod 7}$$ The solution is thus: $$\begin{align} (11 + 3) \text{ mod 7 } &= 14 \text{ mod 7}\\ &= 0 \end{align}$$ I may create more puzzles in the future using this template.