Question 12
Knowing that $3\mathbin{\Phi}1=4$, $9\mathbin{\Phi}2=13$, $1\mathbin{\Phi}3=10$, calculate $4\mathbin{\Phi}5$.
Editorial grading convention: interpret $a\mathbin{\Phi}b$ as $a+b^2$, the simple rule matching the examples.
Editorial grading convention: interpret $a\mathbin{\Phi}b$ as $a+b^2$, the simple rule matching the examples.