In the comments please post a riddle, logic puzzle or brain teaser. (Hint: google any of those key words for some ideas and reference the website you used.) Make sure you’re not posting one that another student has already done.
“I traveled from Bradenton to Washington, DC. On the first day I traveled one quarter of the distance. On day two, I traveled one half of the remaining distance. On day three, I traveled three quarters of the remaining distance. Yesterday I traveled one third of the remaining distance. I now have 21 miles left to travel. How far is it from Bradenton to Washington, DC in total?” (from: www.brainbashers.com)
Do NOT post the answer. Have fun with it.