3 men paid $30 for a motel room, $10.00 each. they were told that they over paid by $5.00, and were given back 5 one doller bills. perplexed, they each kept $1.00 and gave $2.00 to the bell hop. thus each man paid $9.00, total of $27.00, and $2.00 to the bell hop. total of $29.00. where did the missing doller go?