Question 173
what are the last two digits of the number $$
8 + 88 + 888 + \cdots + \overbrace{88 \cdots 88}^{2008} ?
$$
8 + 88 + 888 + \cdots + \overbrace{88 \cdots 88}^{2008} ?
$$
MathNet 2010 — Part 01 Question 173
Math Olympiad Vault · MathNet 2010 — Part 01