Can you divide numbers from 1 to 9 (1 2 3 4 5 6 7 8 9) into two groups so that the sum of the numbers of each group is equal?

Note: 9 cannot be turned over to make it 6.

I ask Joseph to pick any 5 cards out of a deck with no Jokers.

He can inspect then shuffle the deck before picking any five cards. He picks out 5 cards then hands them to me (Jack can't see any of this). I look at the cards and I pick 1 card out and give it back to Joseph. I then arrange the other four cards in a special way, and give those 4 cards all face down, and in a neat pile, to Jack.

Jack looks at the 4 cards i gave him, and says out loud which card Joseph is holding (suit and number). How?

The solution uses pure logic, not sleight of hand. All Jack needs to know is the order of the cards and what is on their face, nothing more.

Why is 6 afraid of 7?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

81 x 9 = 801. What must you do to make the this equation true?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

A man dies of old age on his 25 birthday. How is this possible?

What four weights can be used to balance from 1 to 30 pounds?