Read the row of digits below from left to right.
5 7 3 1 8 3 1 7 3 2 6 7 3 1 4 9 3 1 2 7 3 1 5 8 7 3 6
Count the 3s that have 7 directly before them and 1 directly after them. How many such 3s are there?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 3
Check every 3 in the row: the digit before it must be 7, and the digit after it must be 1.
Place 3: 7 3 1 — counts
Place 6: 8 3 1 — does not count (preceded by 8)
Place 9: 7 3 2 — does not count (followed by 2)
Place 13: 7 3 1 — counts
Place 17: 9 3 1 — does not count (preceded by 9)
Place 21: 7 3 1 — counts
Place 26: 7 3 6 — does not count (followed by 6)
So the answer is 3.