The respective number of significant figures for the numbers 23.023, 0.0003 and 2.1 x 10-3 are

Option 1)

4, 4, 2

Option 2)

5, 1, 2

Option 3)

5, 1, 5

Option 4)

5, 5, 2

Answers (1)

1)    23.023 has 5 significant digits

2)     0.0003 has only 1 significant digits as zero to the left of first non zero digit are not significant.

3)    2.1 x 10-3  It has two significant digits

        As we learnt earlier in Based on Tip: Leading Zeros

0.543    - three   significant figures

0.069    - two  significant figures

0.002    -one significant figure

and Based on Tip: Exponential rotation

1.32 X10-2    -three significant figures

 


Option 1)

4, 4, 2

It is an in incorrect option

Option 2)

5, 1, 2

It is the correct option.

Option 3)

5, 1, 5

It is an incorrect option.

Option 4)

5, 5, 2

It is an incorrect option.

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