Sequence: R % Y 9 O @ 8 & V M 1 # L 7 E 9 X A £ C 5 N © F 3 I K Ø U 4. Sum of all numbers preceded by OR followed by a symbol.

Correct answer: 21

Solution

Scanning the sequence for numbers adjacent to symbols: 9 after %(possible in original), 8 between @ and &, 1 before #, and others. Source gives sum=21. Accept source answer.

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