Question: In the measurement 123.45, how many significant figures are present?
Options:
3
4
5
6
Correct Answer: 5
Solution:
All digits in 123.45 are significant, giving a total of 5 significant figures.
In the measurement 123.45, how many significant figures are present?
Practice Questions
Q1
In the measurement 123.45, how many significant figures are present?
3
4
5
6
Questions & Step-by-Step Solutions
In the measurement 123.45, how many significant figures are present?
Step 1: Look at the number 123.45.
Step 2: Identify each digit in the number.
Step 3: Count all the digits: 1, 2, 3, 4, and 5.
Step 4: Remember that all non-zero digits are significant.
Step 5: Since all digits (1, 2, 3, 4, 5) are non-zero, they are all significant.
Step 6: Add up the significant digits: 1 + 1 + 1 + 1 + 1 = 5.
Step 7: Conclude that there are 5 significant figures in the number 123.45.
Significant Figures – Significant figures are the digits in a number that contribute to its precision, including all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion.
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