Brain Teasers

Using only addition, how do you add eight 8's and get the number 1000?

888 + 88 + 8 + 8 + 8 = 1000

two

All my pets are dogs, but one, and all my pets are cats, but one. How many pets do I have?

three

If two fish are in front of a fish, two fish are behind a fish, and a fish is inbetween two fish, what is the lowest number of fish there can be?

silence

What can you break by saying it's name?

Which 3 numbers have the same answer whether they're added or multiplied together?

1, 2 and 3.

There is a three digit number. The second digit is four times as big as the third digit, while the first digit is three less than the second digit. What is the number?

141

the north pole

A man lives in a four-sided house with a window on each side. If they all face south, where does he live?

zero

How many animals did Moses take on the ark?

fifteen cents

If one is five cents, and ten is ten cents, how much is one-hundred?

I am an odd number. Take away one letter and I become even. What number am I?

Seven (take away the 's' and it becomes 'even').

the core

You are falling. Then you suddenly start falling up! Where are you?

nowhere

A plane crashed in the Pacific Ocean, where were the survivors buried?

There is a basket containing 5 apples, how do you divide the apples among 5 children so that each child has 1 apple while 1 apple remains in the basket?

4 children get 1 apple each while the fifth child gets the basket with the remaining apple still in it.

Sally is 54 years old and her mother is 80, how many years ago was Sally's mother three times her age?

41 years ago, when Sally was 13 and her mother was 39.

Two girls were born to the same mother, at the same time, on the same day, in the same month and in the same year and yet somehow they're not twins. Why not?

Because there was a third girl, which makes them triplets!

during the day

When is it possible to turn off the light in your room and get to your bed on the other side of the room before it gets dark?

straight up

You throw a ball, it reverses direction in midair and comes back to you. In which direction did you throw it?

What word looks the same backwards and upside down?

SWIMS

A ship anchored in a port has a ladder which hangs over the side. The length of the ladder is 200cm, the distance between each rung in 20cm and the bottom rung touches the water. The tide rises at a rate of 10cm an hour. When will the water reach the fifth rung?

The tide raises both the water and the boat so the water will never reach the fifth rung.

1234

What is the square root of 1234 squared?

a window

What item can allow you to see through walls?