Tasty brownies!!!

Number Theory Level 2

You're going to a friends house and want to give them some brownies. On the way to their house you cross 5 bridges. At each bridge you must pay a toll of half of your brownies to the owner. But they are all very nice and give you back a brownie from what you give them.

How many brownies must you start with to give your friend 2 brownies?


The answer is 2.

Tanveen Dhingra by tanveen dhingra , 19, India

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2 solutions

Sagnik Biswas
Oct 22, 2014

The answer will be 2. Since the result is 2 just calculate from the 5th bridge and you will get your initial result.

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Tanveen Dhingra
Oct 22, 2014

Just 2.

Each time you give the owner of a bridge half of your brownies (1 brownie) they give you one back as well.

0 Helpful 0 Interesting 0 Brilliant 0 Confused

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