Question

Observe the following numbers:
I) 0.0063
II) 132.00
III) 1004
The number of significant figures in I, II and III respectively is

• A. 4, 3, 5
• B. 4, 5, 4
• C. 4, 3, 4
• D. 2, 5, 4

Hint:

Count digits carefully; leading zeros not significant, trailing zeros after decimal significant.

Answer 1

The Correct Option is D

Step 1: Count significant figures
- I) 0.0063 has 2 significant figures (leading zeros not counted).
- II) 132.00 has 5 significant figures (trailing zeros counted after decimal).
- III) 1004 has 4 significant figures (zeros between digits counted).
Step 2: Conclusion
The significant figures are 2, 5, and 4 respectively.