Question 22
The source states that $m$ and $n$ are different whole numbers and gives $5\mathbin{\Phi}2=1$, $7\mathbin{\Phi}25=4$, $6\mathbin{\Phi}18=0$. It asks for $(5\mathbin{\Phi}19)\mathbin{\Phi}19$. Propose a rule that fits all three examples, use it to evaluate the expression, and explain whether that value is forced by the three examples alone.
Source limitation: the operation is shown by examples only; no complete rule is printed. State any inferred rule explicitly. The answer is assessed manually because different rules may fit the given examples.
Source limitation: the operation is shown by examples only; no complete rule is printed. State any inferred rule explicitly. The answer is assessed manually because different rules may fit the given examples.