Here’s a puzzle I’ve lifted from THIS blog (who got it from Facebook poster Millie Johnson):
Arrange the digits 0‑9 into a ten-digit number such that the leftmost n digits comprise a number divisible by n. For example, if the number is ABCDEFGHJK, the three-digit number ABC must be divisible by 3, the five-digit number ABCDE must be divisible by 5, and so on.
answer below:
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3816547290
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