Can you solve it? The most Guardian puzzle ever
by Alex Bellos from on (#6XHHC)
On-brand mathematics
UPDATE: Read the solutions here
Numbers can be odd, even, prime, square, natural, perfect, complex, rational...and as from today they can also be guardians.
Let the numbers be 1, 2, 3, 4, and so on. The guardian of x is the next number that shares at least one digit of x.
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