Five Three Two

What is the answer to the last equation?

5 3 2 = 151012
9 2 4 = 183662
8 6 3 = 482466
5 4 5 = 202504
7 2 5 = ?

10000 × (x × y) + 100 × (x × z) + transpose_digits(x × y + y × z)

transpose_digits() just swaps the digits

Posted in Brain Teasers

Two of the Same Along the Way

This word starts with the same letter it ends with and there are two of the same along the way. There is another pair and one each of two more, just to make you smile. What is the word?

Giggling. It starts and ends with ‘g’ and there are two more ‘g’s in the middle. It also has a pair of ‘i’s and one ‘l’ and ‘n’. Plus, giggling makes you smile ;)

Posted in Riddles

Consecutive Christmas Caroling

My family sings Christmas carols at the hospital where my wife works.
We do this every year and since we started, have not missed a single year.
The next time we do this will be the 18th consecutive Christmas.
My 15 year old daughter has been every time.

How is this possible?

She was born in March 1999 so the first year she came was December 1999 (before her 1st birthday).
Her first time was when she was 0, second time when she was 1, third time when she was 2, etc…

Now that she is 15, she has been 16 times. Oh and of course she was also present in December 1998 in her mum’s belly, due to be born the next March.

So, a total of 17 times and next time will be the 18th.

Thanks to Michael for submitting this real-life brain teaser about his family.

Posted in Brain Teasers

T is Like an Island

How is the letter T like an island?

It’s in the middle of waTer.

Posted in Riddles

I Come in the Form of a Question

I come in the form of a question. If you don’t know the answers, you will think a lot, but when you know or you are being told the answer it sounds simple that you will think everybody can easily know.

A riddle or brain teaser.

Posted in Riddles
Tagged with

Dead and Bound

Dead and bound,
what once was free.
What made no sound,
Now sings with glee.

What is it?

Any wooden, stringed instrument (guitar, violin, cello, ukulele, etc)

Posted in Riddles

A Big Family Photo

A family photo has the following:
1 grandfather, 1 grandmother
2 fathers, 2 mothers
6 children, 4 grandchildren
2 brothers, 2 sisters
3 sons, 3 daughters
1 father-in-law, 1 mother-in-law
1 daughter-in-law

It could show 29 different people, but what is the smallest number of people if could have?

Eight. 4 children, their mother and father and one set of grandparents.

Posted in Brain Teasers

From Scraps to Pants

A tailor can make a pair of pants from the scraps left over from sewing up five pairs of pants. If he has twenty-five scraps, how many pairs of pants can he make?

Six pairs of pants. He can make five initially, but once he’s done making five pairs of pants, he’ll have five remaining sets of scraps, meaning he can make an additional pair of pants, totaling six.

Posted in Brain Teasers

How to Make the Great Escape

Shawn and Kyle are bunk mates in prison and are desperate to escape. There is an unbarred window high above them, but the walls are smooth and it’s too high for them to reach even when standing on each other’s shoulders. Their cell has no furnishings other than a toilet and even when standing on the toilet and each other’s shoulders, they can’t reach the window.

They’ve tried digging through the dirt floor but the wall extends 50 feet below. How could escape through the window?

Smurf imprisoned

They could dig down with their hands, but it would take too long to dig 50 feet down. Instead, they could pile the dirt they dig up to give them enough height to reach the window. If they put the toilet seat down, they could pile the dirt on top, then get on each other’s shoulders to reach the window. That would mean only one of them would be able to get out. The remaining prisoner could either continue piling dirt to account for the missing guy or the escaped prisoner could come back with a rope to help his mate escape.

Posted in Brain Teasers

I Was Not Born

I was not born, but I am here.
I have no name, but I am given many.
I was made by science and life.

What am I?

A clone.

Posted in Riddles
Tagged with