Best riddles

cleanfunnyprobability

What is risk?

There was once a college that offered a class on probability applied to the real world. The class was relatively easy, but there was a catch. There were no homework assignments or tests, but there was a final exam that would have only one question on it. When everyone received the test it was a blank sheet of paper with a solitary question on it: "What is risk?" Most students were able to pass, but only one student received 100% for the class! Even stranger was that he only wrote down one word! What did he write?
He, brilliant student, wrote down: "This".
81.57 %
66 votes

logicmathshort

Number 45

Can you write number 45 using only the number 4?
44+44/44
80.93 %
36 votes

logicmathshort

Really hard algebra puzzle

2+3=8, 3+7=27, 4+5=32, 5+8=60, 6+7=72, 7+8=? Solve it?
98 2+3=2*[3+(2-1)]=8 3+7=3*[7+(3-1)]=27 4+5=4*[5+(4-1)]=32 5+8=5*[8+(5-1)]=60 6+7=6*[7+(6-1)]=72 therefore 7+8=7*[8+(7-1)]=98 x+y=x[y+(x-1)]=x^2+xy-x
80.86 %
43 votes

logicshort

The smallest number

Which is the smallest number that you can write using all the vowels exactly once?
fIvE thOUsAnd (5000).
80.62 %
56 votes

animal

Vicious dog

A very vicious dog is tied to a tree. If you came close enough, you'ed lose your head. If he sees you, he'll follow your every step. Your basket ball rolls past the dog. If you are alone, how do you get your ball back with out being mutilated?
Walk around the tree until there is no more rope left on the dogs leash. Then, grab your ball.
80.62 %
56 votes