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Number directly above 142

Source: 1993 AMC 8 Problem 24

June 28, 2011
AMC

Problem Statement

What number is directly above 142142 in this array of numbers?
123456789101112⋯\begin{array}{cccccc} & & & 1 & & \\ & & 2 & 3 & 4 & \\ & 5 & 6 & 7 & 8 & 9 \\ 10 & 11 & 12 & \cdots & & \\ \end{array}
<spanclass=′latex−bold′>(A)</span> 99<spanclass=′latex−bold′>(B)</span> 119<spanclass=′latex−bold′>(C)</span> 120<spanclass=′latex−bold′>(D)</span> 121<spanclass=′latex−bold′>(E)</span> 122<span class='latex-bold'>(A)</span>\ 99 \qquad <span class='latex-bold'>(B)</span>\ 119 \qquad <span class='latex-bold'>(C)</span>\ 120 \qquad <span class='latex-bold'>(D)</span>\ 121 \qquad <span class='latex-bold'>(E)</span>\ 122
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