# Blog

**2017-12-18**

## Christmas card 2017

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### Comments

Comments in green were written by me. Comments in blue were not written by me.

Thanks for the puzzle!

Is it possible that the question 9 is no correct?

I get a penguin with perfect simetrie except at answer 9 : 0100000 that breaks the simetry.

Is it correct or a mistake in my answer?

Thx

Is it possible that the question 9 is no correct?

I get a penguin with perfect simetrie except at answer 9 : 0100000 that breaks the simetry.

Is it correct or a mistake in my answer?

Thx

Jose

@C: look up something called Frobenius numbers. This problem's equivalent to finding the Frobenius number for 14 and 29.

Lewis

What a fun diversion! I have to admit I can't remember how to solve #2 - I finally had to write some code. (So primitive.)

Heather

@Matthew: Thank you for the clarification!

I don't want to spoil the answer for anyone, but my Christmassy picture looks like a well dressed bird.

I don't want to spoil the answer for anyone, but my Christmassy picture looks like a well dressed bird.

Claudio

Is that a book with 116 2 sided sheets, or is the page number at the end of the book 116?

Claudio

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2019-01-0410,000and 100,000 that do not contain the digits 0, 1, 2, 3, 4, 5, or 6.