Question

How many significant digits does 230 have?

Answer 1

Hint: Significant digits are referred to the number of important single digits including 0 and 9. We should know that the number of significant figures in the expression indicates the confidence or precision with which an engineer or scientist indicates a quantity.

Complete step by step answer:
Let’s discuss the question now.
The total number of important single digits including 0 and 9 are called significant digits. The concept of significant figures come more into action with the help of precision and accuracy in real-life applications. If we talk about precision, we can say precision refers to the closeness of two or more values to each other. It is the level of measurement that gives the same result when repeated. And the other one is accuracy. Accuracy means the level of measurement that gives true as well as consistent results. If a value is accurate, that means it has no systematic as well as random errors. Accuracy gives the results which are the same as the true results.
There are certain rules which need to be followed while measuring the significant figures.
First is all non-zero digits are significant. Second is that zeros between non-zero digits are significant. Third is that the final zero in the decimal portion only are significant.
Now, let’s see some rules which guide how to measure significant figures.
1. The digits which are non-zero are significant. For example: 6543 has 4 significant digits and 0.324 has 3 significant digits.
2. If there is any zero which precedes the non-zero digit, then it is not significant. The preceding zero indicates the location of the decimal point. For example: In 0.005 there is only one significant and the number 0.00232 has 3 significant figures.
3. If in any case, there is a zero between two non-zero digits then it will also be a significant digit.
For example: 4.5006 have five significant digits.
4. Also, zeroes which are at the end or on the right side of the number are also significant.
For example: 0.500 has three significant digits.
5. Counting the number of objects like 2 pens 4 pencils have infinite figures as these are not exact numbers.

So, 230 have a total 2 significant digits.

Note: Significant figures deal with accuracy and precision. Before writing the number of significant figures, please keep all the rules in mind. The use of significant figures can be seen in scientific notations. These figures always come in use for science students.