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BEBRAS 2023 Grade 9-10 Round 2 Ext Question 9

BEBRAS · BEBRAS 2023 Grade 9-10 Round 2 Ext

Question 9

Tom uses the following figures to encode letters.

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Each figure and its three successive 90° clockwise rotations correspond, in order, to four consecutive letters of the English alphabet. This example gives the letters encoded by the first figure and its rotations.

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Which string could be encoded by the following sequence?

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  1. COMPUTER
  2. CUSTOMER
  3. COMMERCE
  4. COLONIST