UKMT Pink Kangaroo, 2022

Combinatorics Difficulty 1.0 Junior Find the answer United Kingdom

Carolina has a box of 30 matches. She begins to make the number 2022 using matchsticks. The diagram shows the first two digits. How many matchsticks will be left in the box when she has finished?

(A) $20$ (B) $19$ (C) $10$ (D) $9$ (E) $5$

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