Estimation and Approximation

The round off value of 78.25m to the nearest 10m is

• 90

• 78

• 80

• 75

What are the significant figures?

• digits which cannot be written in the form of scientific notations.

• digits which contribute to the precision of that number

• I don't know the exact definition

• None

Round 3650 to 2 significant figures.

• 3600

• 0.36

• 3700

• 37

Which of these numbers below has 3 significant figures?

• 0.086

• 2546

• 0.630

• 9.101

The round off value of 38.23 to the nearest whole number is

• 35

• 40

• 39

• 38

Round 866 to 2 significant figures.

• 900

• 860

• 870

• 865

The correct value of 0.006472867 up to three significant figures is

• 0.00647

• 0.00867

• 0.006

• 0.647

The number of significant figures in 9.00823 are

• Five

• Six

• Three

• One

• 0.4658

• 1.1428

• 0.4822

• 0.4606

Which of these is an approximation of π?