Can you locate the buy and sell signals on today's Nasdaq chart? You don't have to be able to do math, if you can notice 2 lines crossing each other...
ok i had that one at interview too (but for me it was two men and a dog)....
how about this one: i have two ropes and a lighter. i know if i light the end of each rope they will burn for exactly 1 hour. use the ropes to measure exactly 45 mins.