Mathematics

Lorelai Horn

25 July, 23:03

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 32152, 786, 340, and 3999 are not peachy.

How many positive 2-digit numbers are peachy?

+5

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