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Mathematics, 16.11.2020 07:10 springcoates

We call a number peachy if every digit in the number is either a 3 or next to a 3. For example, the numbers 333, 83, 303, and 3773 are all peachy, but the numbers 32523, 786, 340, and 3999 are not peachy. How many positive 3-digit numbers are peachy?

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We call a number peachy if every digit in the number is either a 3 or next to a 3. For example, the...

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