Number of Significant Figures

How many significant figures are there in -0.090 80?

• 3
• 4
• 5
• 6

Round off 1 296 717 to 3 significant figures.

• 1 290 000
• 1 296 000
• 1 297 000
• 1 300 000

Round off 509.96 to 4 significant figures.

• 509.9
• 509.0
• 510.0
• 510

0.027 182 =

• 0.02, correct to 1 significant figure
• 0.027, correct to 2 decimal places
• 0.027 1, correct to 3 decimal places
• 0.027 18, correct to 4 significant figures

How many significant figures does the following number have? 9 000, correct to the nearest ten

• 1
• 2
• 3
• 4

306 000 cannot be the result of rounding off a number to

• 2 significant figures.
• 3 significant figures.
• 4 significant figures.
• 5 significant figures.

When rounding off a number to k significant figure(s), the result is 290. Which of the following is a possible value of k?

• 1
• 4
• 5
• None of the above