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MathNet 2004 — Part 02 Question 140

Math Olympiad Vault · MathNet 2004 — Part 02

Question 140

How many ordered pairs of integers $(a, b)$ satisfy all of the following inequalities?
$$
\begin{aligned}
a^{2}+b^{2} & \lt 16 \\
a^{2}+b^{2} & \lt 8a \\
a^{2}+b^{2} & \lt 8b
\end{aligned}
$$