MCQs about percents:

1:

What is 10% of 20% of 30%?

A.    0.006%

B.    0.6%

C.     6%

D.    60%

E.     6000%

2:

If 1 micron=10,000 angstroms, then 100 angstroms is what percent of 10 microns?

A.    0.0001%

B.    0.001%

C.     0.01%

D.    0.1%

E.     1%

Answer1:

10% of 20% of 30% = .10 ×.20×.30=0.006=0.6 %  (B)

Answer2:

1 micron=10,000 angstroms

10 micron=100,000 angstroms,  then,

Dividing both sides by 1000 gives

100 angstroms=  1/1000(10 microns ) and

                        1/1000=0.001=0.1%