MathDB
1999 Gauss (7) #14

Source:

July 6, 2011
Gauss

Problem Statement

Which of the following numbers is an odd integer, contains the digit 5, is divisible by 3, and lies between 12212^2 and 13213^2?
<spanclass=′latex−bold′>(A)</span> 105<spanclass=′latex−bold′>(B)</span> 147<spanclass=′latex−bold′>(C)</span> 156<spanclass=′latex−bold′>(D)</span> 165<spanclass=′latex−bold′>(E)</span> 175<span class='latex-bold'>(A)</span>\ 105 \qquad <span class='latex-bold'>(B)</span>\ 147 \qquad <span class='latex-bold'>(C)</span>\ 156 \qquad <span class='latex-bold'>(D)</span>\ 165 \qquad <span class='latex-bold'>(E)</span>\ 175
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