MathDB
1994 AMC 12 #21

Source:

December 30, 2011
algebrabinomial theoremAMC

Problem Statement

Find the number of counter examples to the statement: If N is an odd positive integer the sum of whose digits is 4 and none of whose digits is 0, then N is prime."``\text{If N is an odd positive integer the sum of whose digits is 4 and none of whose digits is 0, then N is prime}." <spanclass=latexbold>(A)</span> 0<spanclass=latexbold>(B)</span> 1<spanclass=latexbold>(C)</span> 2<spanclass=latexbold>(D)</span> 3<spanclass=latexbold>(E)</span> 4 <span class='latex-bold'>(A)</span>\ 0 \qquad<span class='latex-bold'>(B)</span>\ 1 \qquad<span class='latex-bold'>(C)</span>\ 2 \qquad<span class='latex-bold'>(D)</span>\ 3 \qquad<span class='latex-bold'>(E)</span>\ 4