Question 20
An operation ∗ satisfies 2 ∗ 6 = 26 − 2 − 6 and 7 ∗ 3 = 73 − 7 − 3. If a and b are nonzero digits and a ∗ b = 36, find a.
Use the general rule intended by the source: concatenate the two digits, then subtract both digits. Two examples alone would not uniquely define an operation.
Use the general rule intended by the source: concatenate the two digits, then subtract both digits. Two examples alone would not uniquely define an operation.