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by Brian Gladman on February 14, 2020

Sunday Times Teaser 2995 – Pub Celebration

by Howard Williams

Published Sunday February 16 2020 (link)

While celebrating with friends in the pub, it was my round, and I worked out the number of ways that I could get everybody else’s drink wrong. I could remember the drinks (and they all wanted different drinks), but not who wanted which drink.

More friends arrived (there were fewer than twenty of us in total), and everyone still wanted different drinks. Again assuming that I could remember the drinks but not who wanted which drink, I worked out the number of ways that I could get everybody else’s drink wrong, and found that the number was 206 times the first number. Fortunately, it was no longer my round!

What was the second number?

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