Brain Teaser 1
Brain Teaser 2
Brain Teaser 3
Brain Teaser 4
Brain Teaser 5
100

What has one eye but cannot see?

What is a (sewing/knitting) needle.

100

What month of the year has 28 days?

All of them

100

What has a head and a tail but no body?

A coin.

100

I'm as hard as a rock but I melt immediately in hot water. What am I?

Ice

100

I have cities but no houses.  I have mountains but no trees. I have water but fish. What am I?

Map.

200

What has to be broken before you can use it?

Multiple answers: Glow Sticks or Eggs

200

A man dies of old age at the age of 25.  How is this possible?

He was born on a leap year.

200

What word is spelled incorrectly in the dictionary?

Incorrectly.

200

What's harder to catch the faster you run?

Your breath

200

Name three consecutive days without using the words Wednesday, Friday and Sunday. 

Yesterday, Today and Tomorrow. 

300

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

A candle

300

What is taken before you can get it?

A picture.

300

This is always in front of you but can't be seen.

What is the future.

300

I am an odd number, take away a letter and I become even. 

Seven

300

What has many keys but can't open locks?

Piano.

400

The more of this there is, the less you see.  What is it?

Darkness. 

400

What gets wet while drying?

What is a towel?

400

Where does today come before yesterday?

In the dictionary. 

400

If you've got me, you want to share me.  If you want to share me, you haven't kept me. 

A secret.

400

What occurs once in a minute, twice in a moment and never in a thousand years?

The letter M

500

There is a one story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture.  What color are the stairs?

No stairs because it's a one story house. 

500

I have branches but no fruit, trunk or leaves.  What am I?

What is a bank. 
500
You see a boat with people, yet there isn't a single person on board.  How is that possible?
They are all married or couples. 
500

You see me once in June, twice in November and not at all in May.  What am I?

The letter 'e'. 

500

What four letter word can be written forward, backward, or upside down and still be read left to right (Capital letters)?

NOON