How many of these are the correct way of writing measurement?
9.5 cm, 6 m, 5 km., 35 s, 10 kgs.

Explanation

To determine how many of the given measurements are written correctly, we will analyze each one step by step.

### Step 1: Analyze Each Measurement
1. **9.5 cm**: This is a correct way of writing measurement. It has a scalar quantity (9.5) followed by the unit (cm) with a space in between and no full stop at the end.

2. **6 m**: This is also a correct way of writing measurement. Similar to the first, it has a scalar quantity (6) followed by the unit (m) with a space and no full stop.

3. **5 km.**: This is incorrect. Although it has a scalar quantity (5) followed by the unit (km), it incorrectly has a full stop at the end. Measurements should not have a full stop after the unit.

4. **35 s**: This is correct. It has a scalar quantity (35) followed by the unit (s) with a space and no full stop.

5. **10 kgs.**: This is incorrect. The correct unit should be "kg" (not "kgs") and it incorrectly has a full stop at the end.

### Step 2: Count the Correct Measurements
Now, let's count how many of these are correct:
- 9.5 cm: Correct
- 6 m: Correct
- 5 km: Incorrect
- 35 s: Correct
- 10 kgs: Incorrect

Thus, the correct measurements are 9.5 cm, 6 m, and 35 s.

### Final Answer
The total number of correct ways of writing measurement is **3**.

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