Tabitha and Ronan’s Age

Tabitha is 13 years old. Her father Ronan is 40 years old. How many years ago was Ronan four times as old as Tabitha?

Four years ago, when Tabitha was 9 and Ronan was 36 (9 × 4 = 36)

Posted in Brain Teasers

Thirty White Horses On A Red Hill

Thirty white horses on a red hill,
first champ, then stamp, and then stand still

Your teeth.

Posted in Riddles

I Can Be Broken Yet I Hold On

I am a word with two meanings. With one I can be broken, with the second I hold on. What am I?

Tie. A tie score can be broken, but when you tie a knot (as in a necktie) it holds together.

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The Shortest Sentence In the World

What is the shortest sentence in the English language?

Jelly donuts (ice cream is better)

The typical answer to this is “I am,” but some argue that it’s not a complete sentence. However, if someone asked a man named Rupert if he was Rupert, he could reply, “I am” and it would make a complete sentence in my book.

But that’s not the whole answer. There is an even shorter sentence using an imperative with an implied subject (how’s that for an English terminology-filled sentence?) With “Go,” the “you” is implied. For example, if your wife wanted you to go with her to pick up some donuts and you were busy, she might say, “I really want to get some donuts, I’m starving!” and you might reply, “Go!” The implication being you never wanted to get donuts in the first place because you like ice cream more anyway and if you’re busy you’re probably doing something worthwhile and important and can’t be disturbed for such trivial matters as acquiring sweet pastries with holes in them, no matter how much of a waste of time your wife says your pursuits are. In short, “Go” is the shortest sentence in the English language that also has the longest implied meaning. Do you want to get get some ice cream? Go!

Ava pointed out in the comments that No is another viable alternative.

Posted in Brain Teasers

A Smiling Guard

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, “Why are you smiling?”

How did he know his companion was smiling?

They were facing each other. As to why his companion was smiling, the world may never know.

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Many Foods Make Me Strong

Many foods can make me strong but give me water and I won’t last long. What am I?

Fire.

Posted in Riddles

The Most Precious Commodity

What is the most precious commodity?
That which when needed seemingly is never enough,
Yet otherwise can be boringly plentiful.
While waking is oft dreamt of,
Whilst pining can scarcely be thought of.
For beings, is allotted in finite but indefinite quantity.
The more that’s given, the more is wasted.
Freedom is akin though this is something more simple,
Not related to virtue or sin.
Unless perhaps, without freedom, or its limit.

What is it?

Time.

(Thanks for submitting this one Duke)

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The Correct Name

Donald and Regan are married with four children, named Michael, Farley, Solomon and Larry. They just had a baby girl and are picking the name. It’s down to Olivia, Tiffany and Jasmine. Donald’s brother, a piano teacher, tells them only one of the names would be correct. Which name is it?

Tiffany. The rest of the family’s names start with solfège syllables: Do, Re, Mi, Fa, Sol, La. The last syllable is Ti, for Tiffany.

Posted in Brain Teasers

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

Largest Product

Using all the digits from 1 to 7, what two numbers have the largest product? For example, 1234 x 567 = 699678 but you can do much better than that.

742 x 6531 = 4,846,002.

A similar problem can be found in L.A. Graham’s Ingenious Mathematical Problems and Methods with a range of 1 to 9, but the principle remains the same – the numbers with the smallest difference produce the largest product. You start out with the highest two digits, 7 and 6, then attach 5 and 4, putting the smaller of the two digits with the larger number, giving you 74 and 65. The next two highest digits are 3 and 2, giving you 742 and 653. Finally, you add the 1 to the lower number. Page 80 has the details of that solution.

Posted in Brain Teasers