National 5 Prefixes and Rounding

Question 1

What does the prefix G stand for?

Answer 1

G stands for giga

giga = x 10⁹

Question 2

What does the prefix µ stand for?

Answer 2

µ stands for micro

micro = x 10^-6

Question 3

Round off this number to 3 significant figures.

3.14159

Answer 3

3.14159 rounded off to 3 significant figures is

3.14

Question 4

Round off this number to 3 significant figures.

6.22789

Answer 4

6.22789 rounded off to 3 significant figures is

6.23

Question 5

Round off this number to 3 significant figures.

1,526.33

Answer 5

1,526.33 rounded off to 3 significant figures is

1,530

(the ‘2’ has been rounded up to 3)

Question 6

What does the prefix n stand for?

Answer 6

n stands for nano

nano = x 10^-9

Question 7

Round off this number to 3 significant figures.

0.0025668

Answer 7

0.0025668 rounded off to 3 significant figures is

0.00257

Question 8

What does the prefix k stand for?

Answer 8

k stands for kilo

kilo = x 10³

Question 9

What does the prefix M stand for?

Answer 9

M stands for mega

mega = x 10⁶

Question 10

What does the prefix m stand for?

Answer 10

m stands for milli

milli = x 10^-3