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Problem 85

Combinatorics Difficulty 1.0 Find the answer UKMT Grey Kangaroo · United Kingdom · 2022

The front number plate of Max's car fell off. He put it back upside down but luckily this didn't make any difference. Which of the following could be Max's number plate?

(A) $04\ NSN\ 40$ (B) $80\ BNB\ 08$ (C) $03\ HNH\ 30$ (D) $08\ XBX\ 80$ (E) $60\ HOH\ 09$

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