Round off the following numbers upto three significant figures

Options

A. 2.520
B. 4.645
C. 22.78
D. 36.35

Explanation

To round off the given numbers to three significant figures, we will follow a systematic approach for each number. Here’s how we can do it step by step:

### Step 1: Round off 2.520
1. Identify the number: **2.520**
2. Count the significant figures: There are **4 significant figures** (2, 5, 2, 0).
3. We need to round it to **3 significant figures**.
4. Look at the digit after the third significant figure (which is 0). Since 0 is less than 5, we do not change the third significant figure.
5. Therefore, the rounded value is **2.52**.
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