a:1:{i:0;a:13:{s:2:"id";s:3:"653";s:7:"answer1";s:207:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=%5Cfrac%7B6%20%5Ccdot%205%20%5Ccdot%204%7D%7B6%5E3%7D" alt="\frac{6 \cdot 5 \cdot 4}{6^3}" /></p>";s:7:"answer2";s:169:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=%5Cfrac%7B3%5E3%7D%7B6%5E3%7D" alt="\frac{3^3}{6^3}" /></p>";s:7:"answer3";s:221:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=%5Cfrac%7B%7B6%20%5Cchoose%203%7D%20%5Ccdot%203!%7D%7B6%5E3%7D" alt="\frac{{6 \choose 3} \cdot 3!}{6^3}" /></p>";s:7:"answer4";s:201:"<p><img class="latex" src="https://chart.googleapis.com/chart?cht=tx&amp;chf=a,s,000000|bg,s,FFFFFF00&amp;chl=%5Cfrac%7B%7B6%20%5Cchoose%203%7D%20%7D%7B6%5E3%7D" alt="\frac{{6 \choose 3} }{6^3}" /></p>";s:7:"answer5";s:0:"";s:7:"answer6";s:0:"";s:7:"answer7";s:0:"";s:7:"answer8";s:0:"";s:7:"answer9";s:0:"";s:8:"answer10";s:0:"";s:4:"good";s:10:"1000000000";s:8:"question";s:4:"1913";}}