MathDB
Product of Digits

Source:

November 26, 2009
number theoryprime factorization

Problem Statement

How many 3 3-digit positive integers have digits whose product equals 24 24? <spanclass=′latex−bold′>(A)</span> 12<spanclass=′latex−bold′>(B)</span> 15<spanclass=′latex−bold′>(C)</span> 18<spanclass=′latex−bold′>(D)</span> 21<spanclass=′latex−bold′>(E)</span> 24 <span class='latex-bold'>(A)</span>\ 12 \qquad <span class='latex-bold'>(B)</span>\ 15 \qquad <span class='latex-bold'>(C)</span>\ 18 \qquad <span class='latex-bold'>(D)</span>\ 21 \qquad <span class='latex-bold'>(E)</span>\ 24
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