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2022 AMC 12B Problems/Problem 3

Revision as of 17:06, 17 November 2022 by Bxiao31415 (talk | contribs) (Created page with "== Problem == How many of the first ten numbers of the sequence <math>121</math>, <math>11211</math>, <math>1112111</math>, ... are prime numbers? <math>\text{(A) } 0 \qquad \...")
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Problem

How many of the first ten numbers of the sequence $121$, $11211$, $1112111$, ... are prime numbers? $\text{(A) } 0 \qquad \text{(B) }1 \qquad \text{(C) }2 \qquad \text{(D) }3 \qquad \text{(E) }4$

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