Read the row of digits below from left to right.
0 6 5 9 9 2 8 5 5 8 4 3 8 2 2 3 4 8 6 3 6 4 8
How many odd digits in this row have an even digit directly before them and an even digit directly after them?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 3
Check every odd digit in the row: the digits on both sides of it must be even (0, 2, 4, 6 or 8).
Place 3: 6 5 9 — does not count (followed by 9, which is odd)
Place 4: 5 9 9 — does not count (preceded by 5, which is odd)
Place 5: 9 9 2 — does not count (preceded by 9, which is odd)
Place 8: 8 5 5 — does not count (followed by 5, which is odd)
Place 9: 5 5 8 — does not count (preceded by 5, which is odd)
Place 12: 4 3 8 — counts
Place 16: 2 3 4 — counts
Place 20: 6 3 6 — counts
So the answer is 3.