Question

The respective number of significant figures for the numbers 24.069, 0.005 and 5.1 × 10⁻³ is:
1) 5, 4, 2
2) 4. 1, 2
3) 5, 1, 2
4) 5, 1, 5

Answer 1

3 option correct

:)24.069 = all significant figures as all non zero digits are significant

:) 0.005 = only 5 as zeros preceding first non zero digit are not significant

:) 5.1 ×-10³ = only 5 and 1 significant as

= 51/10 × -1000

= -5100

= as zeros at right of the number are only significant after decimal, so here only 5 and 1 are significant