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# Generation Bee

Go to solution Solved by Rob_Gandy,

## Question

Every male bee has just a female parent, while every female bee has both a male and a female parent. How many ancestors does a male bee have, counting twenty generations?
Note: Don't count this male as a generation or include him in the 'final tally.'

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• Solution

28655 bees. After the 5th generation I realized what was going on.

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28655 bees. After the 5th generation I realized what was going on.

I have you slightly off.

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17710 Female ancestors and 10945 male ancestors for a total of 28655.

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but I got

28656

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but I got

28656

Do you count "this male bee" too? Because I can't get more than 28655 either.

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M(n) = F(n+3) - 2

where M(n) is a number of ancestors of a male bee counting n generations and F(k) stands for k-th Fibonacci number
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28656 ancestors!

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28656 ancestors!

I got the same answer but the rest of the board didn't agree with me.

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28655 bees

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