Hard Riddles — Can You Solve Them?

A snail is at the bottom of a 20 meters deep pit. Every day the snail climbs 5 meters upwards, but at night it slides 4 meters back downwards. How many days doe...

Of all the numbers whose literal representations in capital letters consists only of straight line segments (for example, FIVE), only one number has a value equ...

The combined age of Jack and John is 49. Jack is twice as old, as John was when Jack was as old as John is now. How old are the brothers?

You want to hire a temporary employee for one month. You offer him reasonable wages, but the employee suggests an alternative. For the first day of work, he wil...

My sister has two children. I had two children. My brother has two children. My cousin has two children. Wow, that's a lot of children! How many children are th...

I am a five letter word and I am a fruit. Take the first letter out and I am a crime, take out the first and second letter and I am a animal, take out the first...

You have two ropes. Each rope can burn in exactly one hour. The ropes are not of the same length or width. Both ropes are also not of uniform width or thickness...

An interesting formula for generating a good many (but not all) primes is n2 + n + 41. If we plug in consecutive integers 1, 2, 3, etc., at least up to a certai...

A man forgot the secret code to open his locker. But he remembers the following clues: Fifth number plus the third number equals fourteen. First number is one...

I'm teary-eyed but never cry. Silver-tongued, but never lie. Double-winged, but never fly. Air-cooled, but never dry. What am I?

A man is trapped in a room. The room has only two possible exits: two doors. Through the first door there is a room constructed from magnifying glass. The blazi...

There is a party of 100 high-powered politicians. All of them are either honest or liars. You walk in knowing two things: - At least one of them is honest. - I...

What you're looking for ... I'll hide it from you. However if you ask, I'll lead you right through. You're tempted to cross me, an act I won't prevent. If chose...

I am a fruit. If you take away the first letter of my name I become a crime. Take away the first two letters of my name I become an animal. Take away the first...

A hundred feet in the air, but it's back is on the ground. What is it?

If you throw me out the window, I'll leave a grieving wife. Bring me back, but through the door, You'll see someone giving life. What am I?

Is an older one-hundred dollar bill worth more than a newer one?

A man wants to enter an exclusive club, but he doesn't know the password. Another man walks to the door and the doorman says 12, the man says 6, and is let in....

One strand dangles. Two strands twist. Three or more can fashion this.

When is 1500 plus 20 and 1600 minus 40 the same thing?

If 1+9+8=1, what is 2+8+9?

With thieves I consort, With the vilest, in short, I'm quite at ease in depravity; Yet all divines use me, And savants can't lose me, For I am the center of gra...

You will always find me in the past. I can be created in the present, But the future can never taint me. What am I?