Question

Which of the following have same number of significant figures?
A. 0.00253
B. 1.0003
C. 15.0
D. 163
Choose the correct answer from the options given below

• A. B and C only
• B. C and D only
• C. A, B and C only
• D. A, C and D only

Hint:

Significant figures include all meaningful digits in a number. Use the rules for counting significant figures carefully, especially for decimals and trailing zeros.

Answer 1

The Correct Option is D

Significant figures represent all the digits in a number that are meaningful in terms of precision. They include all non-zero digits, zeros between non-zero digits, and trailing zeros in decimal numbers. Here is the breakdown:

• 0.00253 : Contains 3 significant figures (leading zeros are not counted).
• 1.0003 : Contains 5 significant figures (includes all digits, including zeros between non-zero digits).
• 15.0 : Contains 3 significant figures (the trailing zero is significant in decimal numbers).
• 163 : Contains 3 significant figures (all digits are non-zero).

Thus, 0.00253 (option A), 15.0 (option B), and 163 (option C) all have the same number of significant figures, which is 3.

Therefore, the correct answer is option (4).