How many significant figures does the following number have?

How many significant figures does the following number have?

1.050
0.000310

* I think the first one has only 1 significant figure, and the second one only has 3. Please correct me if I am wrong.

1 st has three
2nd has 5

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2 Responses to How many significant figures does the following number have?

  1. Ramon says:

    first one has four

    second one has 3
    References :

  2. William says:

    1 st has three
    2nd has 5
    References :
    tryst me.