Significant Figures and Their Rules

The video tutorial covers the concept of significant figures, focusing on the rules for determining which digits in a number are significant. It explains the significance of zeros in different positions, the role of decimal points, and provides numerous examples and practice problems to illustrate these concepts. The tutorial concludes with a review of the main rules and a brief introduction to operations involving significant figures.

What is the significance of zeros that are sandwiched between non-zero digits?

• They are significant only if there is a decimal point.

• They are never significant.

• They are always significant.

• They are significant only if they are at the end of the number.

If a number has zeros to the right of a non-zero digit and there is no decimal point, how many significant figures does it have?

• All zeros are significant.

• Only the non-zero digit is significant.

• None of the digits are significant.

• Only the zeros are significant.

How do zeros to the left of non-zero digits affect the count of significant figures?

• They are always significant.

• They are never significant.

• They are significant only if they are at the end of the number.

• They are significant only if there is a decimal point.

In a number like 84.1000, how many significant figures are there?

• Seven

• Five

• Four

• Three

What is the rule for zeros to the right of non-zero digits when there is a decimal point?

• They are significant only if they are at the end of the number.

• They are significant only if they are sandwiched.

• They are never significant.

• They are always significant.

In the number 3008, how many significant figures are there?

• Five

• Three

• Four

• Two

Which of the following numbers has exactly three significant figures?

• 0.0456

• 4560

• 456.0

• 0.00456

How many significant figures are in the number 0.000789?

• Four

• Six

• Five

• Three

What is the total number of significant figures in 40.000?

• Three

• Two

• Five

• Four

Which rule applies to zeros that come before non-zero digits?

• They are significant only if there is a decimal point.

• They are significant only if they are at the end of the number.

• They are never significant.

• They are always significant.