Best short difficult riddles

crazyfunny

Why is the sun so bright?
Because it pays attention in the class and does its homework on time.
67.31 %
100 votes
logicclean

Can you punctuate the following, in order to make it a proper English sentence? I said that that that that that man wrote should have been underlined
I said that, "that 'that' that that man wrote should have been underlined."
66.69 %
60 votes
cleanlogic

Two mothers and two daughters went out to eat, everyone ate one burger, yet only three burgers were eaten in all. How is this possible?
They were a grandmother, mother and daughter.
66.45 %
248 votes