Canaries in the Cage

I am the owner of a pet store. If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

Four canaries and three cages.

If you put one canary in each cage, you have an extra bird without a cage. However, if you put two canaries in each cage then you have two canaries in the first cage, two canaries in the second cage and an extra cage.

Posted in Brain Teasers

Nine Matchbox Sticks To Ten

I have nine matchbox sticks and would like to make ten. How do I do it?

Arrange the nine matchbox sticks like so to make the shape of the number ten:

        _
    /| | |
     | |_|
Posted in Brain Teasers

I Never Return

What are these three related items? When I am placed somewhere I will never stand up. Whatever you give me I will eat. When I go I never return.

A stove, fire, smoke.

Essentially a duplicate of A Group of Three but I’m keeping it here to avoid broken links.

Posted in Riddles

MT Rebus

MT

Empty.

Posted in Riddles
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Debbie’s Dragster

Debbie starts driving her dragster from rest and constantly accelerates to 60 mph in 10 seconds. How far does she travel in those 10 seconds?

1/12 mile

Ten seconds is 1/6 of a minute and 1 minute is 1/60 of an hour, so 10 seconds is 1/360 of an hour.

If you graph her trip with the speed on the y-axis and the time on the x-axis, you get a triangle with height of 60 mph and width of 1/360 of an hour. To calculate the area of the triangle, you multiply 1/2 × 1/360 × 60 = 1/12.

Posted in Brain Teasers

Oct 31 = Dec 25

How can Oct 31 and Dec 25 be the same?

Because Oct 31 represents the octal (base 8) number 31, which, when converted to decimal, is 25. Dec 25 is short for Decimal 25, thus the two are equal.

Posted in Brain Teasers

All About But Can’t Be Seen

All about, but cannot be seen,
Can be captured, cannot be held
No throat, but can be heard.

Sounds / noises. Wind also works.

Posted in Riddles

An Elevator Accident

I’m in an elevator with two other people. When it reaches the first floor, one person gets out and six get in. When it reaches the second floor, three people get out and twelve get in. At the third floor, five leave and nine enter. It rises to the fourth floor, one person gets on and the doors close. Suddenly, the elevator cable snaps and the car smashes to the ground. No one survives the fall, yet I’m alive and know exactly how many people go on and off the elevator at every floor. How is this possible?

I got off at the first floor. I’m a security guard and knew how many people got on and off the elevator by watching the surveillance footage.

Posted in Brain Teasers

Hangs Others

What hangs others yet can unintentionally hang itself?

A jury.

Posted in Riddles

Archaeologist Laughed At

An archaeologist publicizes his find, a coin marked 649 BC, but is laughed at by his peers. Why?

No coins were ever marked BC because the BC / AD dating system wasn’t even devised until 525 AD. And it wasn’t widely used until after 800 AD.

Posted in Brain Teasers