What do you mean by significant figures?

Explanation

### Step-by-Step Solution:

1. **Definition of Significant Figures**:
Significant figures are the digits in a number that contribute to its precision. This includes all non-zero digits, any zeros between significant digits, and any trailing zeros in the decimal portion.

2. **Identifying Significant Figures**:
To determine the number of significant figures in a given number, follow these rules:
- **Non-zero digits** are always significant.
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