{"status": "success", "data": {"description_md": "A triangular array of $2016$ coins has $1$ coin in the first row, $2$ coins in the second row, $3$ coins in the third row, and so on up to $N$ coins in the $N$th row. What is the sum of the digits of $N$?\n\n$\\textbf{(A)}\\ 6\\qquad\\textbf{(B)}\\ 7\\qquad\\textbf{(C)}\\ 8\\qquad\\textbf{(D)}\\ 9\\qquad\\textbf{(E)}\\ 10$", "description_html": "<p>A triangular array of  <span class=\"katex--inline\">2016</span>  coins has  <span class=\"katex--inline\">1</span>  coin in the first row,  <span class=\"katex--inline\">2</span>  coins in the second row,  <span class=\"katex--inline\">3</span>  coins in the third row, and so on up to  <span class=\"katex--inline\">N</span>  coins in the  <span class=\"katex--inline\">N</span> th row. What is the sum of the digits of  <span class=\"katex--inline\">N</span> ?</p>\n<p> <span class=\"katex--inline\">\\textbf{(A)}\\ 6\\qquad\\textbf{(B)}\\ 7\\qquad\\textbf{(C)}\\ 8\\qquad\\textbf{(D)}\\ 9\\qquad\\textbf{(E)}\\ 10</span> </p>\n<hr><p>Full credit goes to <a href=\"https://maa.org/\">MAA</a> for authoring these problems. These problems were taken on the <a href=\"https://artofproblemsolving.com/\">AOPS</a> website.</p>", "hints_md": "", "hints_html": "", "editorial_md": "", "editorial_html": "", "flag_hint": "", "point_value": 1, "problem_name": "2016 AMC 10A Problem 9", "can_next": true, "can_prev": true, "nxt": "/problem/16_amc10A_p10", "prev": "/problem/16_amc10A_p08"}}