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Q.57. The respective number of significant figures for the numbers 23.023, 0.0003 and 2.1 $\times 10^{- 3}$ are
(1) 4, 4, 2
(2) 5, 1, 2
(3) 5, 1, 5
(4) 5, 5, 2

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Solution

Dear Student ,
23.023 has 5 sf.
0.0003 has 1 sf
2.1*10á¶º3 has 2 sf
Where sf means significant figures .
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