Decode the symbol string to digits using the given number→symbol coding. Coding: 1→!, 2→@, 3→#, 4→$, 5→%, 6→^, 7→&, 8→*, 9→+ Given symbols: ^ * & # !

Introduction / Context:
This is identical in structure to the previous item: invert the mapping and read the digits.

Given Data / Assumptions:

• 1→!, 2→@, 3→#, 4→$, 5→%, 6→^, 7→&, 8→*, 9→+.
• Symbols: ^ * & # !.

Concept / Approach:
Apply the inverse table: symbol→digit.

Step-by-Step Solution:

Verification / Alternative check:
Re-encode 68731 to confirm the original symbol sequence.

Why Other Options Are Wrong:

• They mismatch at least one position (most commonly swapping 8 and 7 or 3 and 1).

Common Pitfalls:
Reading * as multiplication instead of a symbol that encodes 8.

Final Answer:
68731