Six One Seven and Nine to Make Twenty Four

How can the numbers 6, 1, 7 and 9 be arranged to make 24?

91 – 67 = 24
(9 – 6) × (1 + 7) = 3 × 8 = 24

Posted in Brain Teasers

Turning the Years Upside Down

What years from the 1900s and 1800s are the same year when read upside down?

1961 and 1881.

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Penny, Cork and A Bottle

Given a corked bottle with only a penny inside, how can you remove the penny without pulling out the cork, breaking the bottle and leaving the cork intact?

Push the cork into the bottle, then shake the penny out.

Posted in Brain Teasers

A Circular Island

A circular island with a diameter of 30 feet has a 30 foot tree stands at the center. A man cuts the tree down with his chainsaw, making the cut a foot up from the ground. The tree comes crashing down and hits the water but doesn’t splash. Why not?

It’s winter and the water is frozen.

Posted in Brain Teasers

Julian and Penelope’s Marriage Ages

When Julian and Penelope met, one was half the others age plus seven years. Ten years later when they married, Penelope was thirty, but this time one was nine tenths the age of the other. How old was Julian? (No fractions or partial years, whole numbers only).

Julian was 27 when Penelope was 30.

Posted in Brain Teasers

Marcus’ Strange Age

Marcus was 15 years old in 2010. In 2015 he was only 10 years old. How is this possible?

The years are B.C., so 2015 came before 2010.

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I Make Memories That Last a Lifetime

I make memories that last a lifetime,
Without me you’ll be miserable,
If you miss me you can gourge and it’s okay.
Some say I am naturally split in two.

What am I?

Sleep. It’s the time your mind organizes memories and knowledge. Sleep deprivation is miserable (as you well know if you’ve experienced it). If you miss a few nights of sleep, you can sleep more to catch up with no problems. And some believe that segmented sleep, where you sleep, wake for an hour, then go back to sleep, was the dominant form of sleep before the Industrial Revolution.

Posted in Riddles
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Shave Everyday

I can shave everyday but my beard will stay. Who am I?

A barber.

Posted in Riddles

Man Living His Life Underwater

A man dove into the water with no tank, snorkel or any other device to allow him to breathe, yet he stayed down there to live for the rest of his life. How is this possible?

He drowned within a few minutes, which was the rest of his life.

Posted in Brain Teasers

One Six Seven Nine to Twenty Four

Given the numbers 1, 6, 7 and 9, find an equation that equals 24. You may only use each digit once.

91 – 67 = 24 or
(9 – 6) x (7 + 1) = 3 x 8 = 24 or
6 x √9 + 7 – 1 = 18 + 6 = 24

Posted in Brain Teasers