### Brain Teasers

# 97% Caffeine Free

If you were given a can of cola that was 97% caffeine free, how many cans of it would you have to drink in order to consume the same amount of caffeine found in a regular cola?

### Answer

33 1/3 cans. If there is 3% caffeine found in the cola, it would take 100 divided by 3 to equal the same amount.Hide Answer Show Answer

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## Comments

Very good. It was easy considering I'm a math whiz. Keep up the good work.

If the cola were 3% caffeine, then I believe that one drink would give you the equivilent of the normal amount of caffeine in a regular cola. A regular cola has about 40mg of caffeine in a 12oz serving.

contagion has a good point

If it were 97% caffeine free then it is 3% caffeine. A regular cola is not 100% caffeine or that would be pure caffeine.

The teaser never says that a regular cola is 100% caffeine. It only asks how many cans of caffeine-free cola you have to drink to get the same amount of caffeine as in a regular can. The answer is correct.

Wrong - look at the wording. You can't solve this puzzle without knowing how much caffeine is in a regular soda. Otherwise, as was pointed out above, you're calculating for a 100% caffeine drink.

Michelle, you just mass produce teasers, don;t you?

ok. the teaser says that there is 97% less caffiene in the cola than in the other cola. it's not saying that the cola is three percent caffiene or that 100% would make it all caffiene.

"Less?" That word does not appear in the question!

The teaser is faulty. I didn't spend any time trying to solve it since there was missing information.

This teaser does not contain enough information to solve it. It should be removed. It does not say 97% less than regular cola it says 97% caffeine free. Regular cola can't be composed of 100% caffeine - there has to be at least some water in it!

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