Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

What work can one never finish?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

You can see it everyday, But cannot touch it at will. What is it?

Prove that the below maths equation is true.

8 + 8 = 91

What is the difference between a jeweller and a jailer?

I can prove why 1 = 2

* Lets say y = x
* Multiply through by x xy = x2
* Subtract y2 from each side xy - y2 = x2 - y2
* Factor each side y(x-y) = (x+y)(x-y)
* Divide both sides by (x-y) y = x+y
* Divide both sides by y y/y = x/y + y/y
* And so... 1 = x/y + 1
* Since x=y, x/y = 1 1 = 1 + 1
* And so... 1 = 2

How is this possible?

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

I’m tall when I’m young, and I’m short when I’m old. What am I?