Mathematics · Alphanumeric Series
Refer to the given series and answer the question that follows (all numbers are single-digit numbers only, and all counting is to be done from left to right). 2 1 6 8 3 9 5 2 7 6 3 2 9 9 7 3 9 6 4 6 3 2 6 2 2 0 3 4 7 2 How many such even digits are there, each of which is immediately preceded by an odd digit and also immediately followed by an odd digit?
- 14✓
- 23
- 32
- 45
Correct answer
4
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