significant figures

How many significant figures does the following number have?
0.00345

• 6
• 5
• 3
• Ambiguous: 3,4,5, or 6

How many significant figures does the following number have: 0.00204

• 6
• 4
• 3
• 2

• 5
• 3
• Ambiguous: 3 or 5

• 7

How many significant figures does the following number have: 100.00210

• 7
• 8
• 10
• Ambiguous: 7 or 8

How many significant figures does the following number have: 1.001 & 100.10

• 4,5 
• 2,2
• 4,4
• 2,3

How many significant figures does the following number have: 0.001 & 0.01453

• 1, 3
• 1,4
• 3,4
• 1,1

How many significant figures does the following number have: 100 & 100.0

• 1, 4
• 3, 4
• 3,3
• 1,1

 How many significant figures does the following number have: 0.0003 & 0.00030

• 1, 2
• 5, 6
• 4, 4
• 4,5

How many significant figures does the following number have: 201.0 & 201.01

• 4, 4
• 4, 5
• 3, 3
• 3, 5

 How many significant figures does the following number have: 2017 & 2.017

• 3, 4
• 4, 4
• 4, 3
• whole number don't follow SF