Correct Answer & Explanation
Option C
In each valid number, the product of the first (hundreds) and third (units) digit equals the middle (tens) digit:
3 × 1 = 3 in 331
4 × 2 = 8 in 482
5 × 1 = 5 in 551
2 × 3 = 6 in 263
2 × 2 = 4 in 242
1 × 1 = 1 in 111
• For 383, 3 × 3 = 9 ≠ 8. Therefore, 383 is the wrong number.