# pre algebra equation solve

• Feb 26th 2007, 04:58 PM
rose234
pre algebra equation solve
A pharmacist has 2 hectograms 55 grams of pills. Each pill weighs 1 gram 2 centigrams. How many pills does the pharmacist have altogether?
A. 205
B. 250
C. 255
D. 350

I came up with B. 250
• Feb 26th 2007, 05:04 PM
topsquark
Quote:

Originally Posted by rose234
A pharmacist has 2 hectograms 55 grams of pills. Each pill weighs 1 gram 2 centigrams. How many pills does the pharmacist have altogether?
A. 205
B. 250
C. 255
D. 350

I came up with B. 250

We can "logic" this one out, but it makes things a lot easier if we know that hecto is the metric prefix for 100. See here.

However, we know that hecto IS a metric prefix, so it must be some multiple of 10. Thus the pharmacist has 2*10^n + 55 grams, where n is some integer. The only number of that form is answer C, 255.

-Dan
• Feb 26th 2007, 05:16 PM
rose234
You missed a part I think
yes he has 255 grams of pills but each pill is 1 gram and 2 centigrams so how many pills does the pharmacist have?

250?
• Feb 26th 2007, 05:24 PM
topsquark
Quote:

Originally Posted by rose234
yes he has 255 grams of pills but each pill is 1 gram and 2 centigrams so how many pills does the pharmacist have?

250?

:o My apologies! I didn't read the question correctly.

Let's see. 255 g of pills and each pill is 1.02 g. Thus he has
(255 g)/(1.02 g) = 250 pills, just as you said.

-Dan