please help

Let's start at     2  * 3 * 4 * 5 = 120     120 will not work.....but if divided by 5 and 1 is left...how about 121

then if divided by 5     one is left

   same with 4     and   3    and 2

so 121 camels would work the parameters given  BUT the question states it is LESS than 100

     let's back up by 25     to     96     won't work...back up 5 more

          91    works