Triangle with a, b, c

Number Theory Level 2

Let a a and b b two distinct non-zero digit. Is it true that there are infinite number of composite numbers in the seqence below? b ‾ , a b ‾ , a a b ‾ , a a a b ‾ , a a a a b ‾ , … \overline{b}, \overline{ab}, \overline{aab}, \overline{aaab}, \overline{aaaab}, \dots

No, it is false Yes, it is true

Áron Bán-Szabó by Áron Bán-Szabó , 17, Hungary

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