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Question
How many significant figures should be present in the answer of the following calculations?
`(2.5 xx 1.25 xx 3.5)/2.01`
Solution
| Number | Significant figures |
| 2.5 | 2 |
| 1.25 | 3 |
| 3.5 | 2 |
| 2.01 | 3 |
Thus, in the calculation `[(2.5 xx 1.25 xx 3.5)/201]` involving multiplication and division, the number of significant figures will be 2. Since the least number of significant figures from the given figures is 2 (in 2.5 and 3.5) the result should not have more than two significant figures.
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