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AMC 12 2003b Problem 8

  • Paper

Let ♣(x)\clubsuit(x) denote the sum of the digits of the positive integer xx. For example, ♣(8)=8\clubsuit(8) = 8 and ♣(123)=1+2+3=6.\clubsuit(123) = 1 + 2 + 3 = 6. For how many two-digit values of xx is ♣(♣(x))=3?\clubsuit(\clubsuit(x)) = 3?

(A) 3(B) 4(C) 6(D) 9(E) 10\text{(A) }3 \text{(B) }4 \text{(C) }6 \text{(D) }9 \text{(E) }10

Dataset text AMC 12 2000 to 2025. Quoted with source.

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E

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