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Puzzle #135: How do you hit the jackpot on this machine?

By Brian Hobbs

13 October 2021

#135 You don’t know jackpot

New Scientist. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

I figured something was wrong with the slot machine in Pete’s Gas Station when I saw the peeling paint on top. But I knew for certain when I put in 50 cents, got three 7s, and nothing came out.

There are three possible symbols: cherries, a melon and a 7. It should have given me $5 for all three 7s, $2 for two 7s, and $1 if only the rightmost symbol was a 7.

“Oh, it’s fine,” said Pete. “Three 7s was the old jackpot setting. I’ve got the new jackpot written down… it’s here somewhere.” While he was searching, I saw a woman play five times and get the following:…

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