其它
Josh lives on the $6$\textsuperscript{th} floor. He needs to climb $24$ steps to move from the $2$\textsuperscript{nd~}floor to the $4$\textsuperscript{th} floor. How many steps does he need to climb from the $1$\textsuperscript{st} floor to the $6$\textsuperscript{th} floor? 
Overseas Competition->Knowledge Point->Word Problem Modules->Interval Problems
$24 \div 2 \times (6 - 1) = 60$ 