The Man in the Picture

A man is looking at a picture on the wall and says, “Brothers and sisters I have none, but this man’s father is my father’s son.”

What is their relationship?

The man in the picture is the onlooker’s son. Since he doesn’t have any brothers or sisters, the statement my father’s son can only be himself. A shortened version would be this man’s father is me, making him the father of the man in the picture.

Posted in Brain Teasers

The Pattern of Numbers

These series follow a pattern.
2 4 8
1 17 476
65 20987 3571890

This series does not follow the pattern
18 79 45

What is the pattern?

The numbers must be in ascending order. This can be a fun one to have people work out in person, as they test out three-number series and you can tell them whether or not they satisfy the pattern.

Thanks to Patrick for sending this in and thanks to this video from Veritasium for inspiring Patrick.

Posted in Brain Teasers

A Secret From Everyone

I am eight letters long and am kept a secret from everyone. Letters two through four spell an animal, letters four to the end make a weapon, letters one, two and eight make what you use in an exam and my third and fourth letters are the same.

What am I?

A password. You should keep your password a secret from everyone, letters two through four spell ass, an animal also known as a donkey. Letters four to the end spell sword, which is a deadly weapon and the letters one, two and eight make pad, which is used for writing during an exam. Lastly, the third and fourth letters are both ‘s’

Posted in Riddles

Walking Through Paper

You have a regular sized piece of paper. How could you cut a hole in it large enough for you to walk through?

Fold the paper in half and make cuts that are almost entirely across the width of the paper. Switch between sides. When the paper is opened there will be a very large hole that you can climb through (carefully).

Posted in Brain Teasers

One Sunday to Seven Saturday

1. Sunday
2. Monday
3. Tuesday
4. Wednesday
5. Thursday
6. Friday
7. Saturday

What phrase does this represent?

Days are numbered. Commonly used to say someone or something is going to end soon.

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Twice Four and Twenty Blackbirds

Twice four and twenty blackbirds sitting in the rain.
I shot and killed a quarter of them. How many do remain?

After shooting a quarter of the birds, the rest would fly off, so the remaining birds, brutally shot by you, would be:

(2 × (4 + 20)) / 4 = 12

Posted in Brain Teasers

The Train and the Tunnel

A train is a half mile long and is about to enter a 10 mile tunnel. If the train is traveling at 35mph, how long will it take for the entire train to make it through the tunnel, from the front of the train entering to the end of the train leaving the tunnel?

18 minutes.

Length of the train: 0.5 miles
Length of the tunnel: 10 miles
Total distance: 0.5 + 10 = 10.5 miles

Time = 10.5 miles / 35 mph = 0.3 hours = 18 minutes

Posted in Brain Teasers

How Old is Malcolm, His Dad and Grandfather?

Malcolm is the number of weeks of his father’s age treated as days and his grandfather’s age in months. All three of their ages add up to 120 years. How old is Malcolm, his father and his grandfather?

Malcolm is 6.
The father is 42. 42 days = 6 weeks.
The grandfather is 72. 72 months = 6 years.

Posted in Brain Teasers

Spibered Rebus

What does this represent?

SPIbeRED

Be inspired, or literally, be in spired.

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Cheap To Make, Easy To Define

I’m cheap to make and easy to define.
A riverbank could populate the line.

What am I?

A boundary.

By Sef Daystrom

Posted in Riddles