Question

How many significant figures are there in the number 0.001405?

Options

• 7

• 6

• 5

• 4

Answer 1

4

Explanation: 

In numbers less than 1, the zeros to the right of the decimal point and to the left of the first non-zero digit are not significant. In 0.001405, the leading zeros (underlined: 0.001405) are not significant. The significant digits are 1, 4, 0, and 5, giving 4 significant figures.