Question 7
If the eighteen-digit number $a3640548981270644b$ is divisible by $99$, how many possible digit pairs $(a,b)$ are there?
IMC 2002 — Keystage 3 (IWYMIC) — individual Question 7
xIMC · IMC 2002 — Keystage 3 (IWYMIC) — individual
xIMC · IMC 2002 — Keystage 3 (IWYMIC) — individual