Count 40

Last weekend we played “40 tellen” (40 count), a card game published by christian radio station Groot Nieuws Radio.
The game is simple, a player draws a card, which lists an exercise for the other players. The word on top is what the other playerts should try to guess. Below it are 4 words, which should be read one at a time. Players are free to shout their guesses any moment.
Instead of reading the 4 hint words aloud, the player my hum a suggested song, or come up with his or her own hints

Example:
The 4 hint words are apostle, bible, travels, letters.
Solution : Paul.

We played it with the 4 of us and it worked pretty well. It is one of the few instances where a company comes up with puzzle game based on inductive logic. Kudos.

*/*****
1. What are we talking about?
– Venus
– Pluto
– Mercury
– Neptune

**/*****
2. What are we talking about?
– Drill Rap
– Edgar Allen Floe
– Crunk
– Phonk
– Verzuz

A new puzzle is published at least once a month an Friday.

You can check your solutions here

In the bar (2)

You are on the Island of Zwrazr in the Logico archipelago where there are three types of people: Truth-speakers, who always speak the truth, Liars, who always lie, and Switchers, who alternate their sentences between speaking the truth and lying.

In the bar (2)^***/*****
In a bar, the barkeeper shows you to a table with three people: “That table over there, with three people, has exactly one representative of each of the three groups of people on our Island.”
You introduce yourself at the table and the only woman among them says:
My friend to the left of me is a Switcher
My friend to the right of me is a Switcher
What can you say about the barkeeper?

You can check your solutions here

Bongard and chatgpt

ChatGPT is a chat program based on a language model.

I had 2 sessions with it to test its ability to solve Bongard puzzles with language. I think its shows a severe limitation of the AI model used, though I have insufficient knowledge of AI to list

I will first list here the problems, please try to solve them yourself before turning to the solutions, where I will list the replies given by the AI bot.

Problem I^*/*****
What is the difference between the sentences 1) to 6) and the sentences a) to f)?
1) What was Trumps salary as a president?
2) Why do many people like to solve puzzles?
3) How many puzzle magazines are sold yearly worldwide?
4) How many crossword puzzles has The Times published?
5) When will the next election in the Russian Federation be?
6) Who will likely be a candidate rivelling Abraham Lincoln as a president?
vs
a) Donald Trump recdeived the normalm salaray as a president
b) An oak tree can have over a thousand leaves
c) The Times published a crossword puzzle every day
d) Worldwide, puzzles are published in over 100 countries, and many magazines appear monthly.
e) It is widely regarded unlikely that the next election in the Russian Federation will be considered fair.
f) Forcing is a method used in set theory

Problem II^*/*****
What is the difference between the tools 1) to 7) and the tools a) to g)?
1) Violin
2) drums
3) spanish guitar
4) irish flute
5) triangle
6) tambourine
7) organ
vs
a) Hammer
b) chisel
c) saw
d) drill
e) plane
f) pincers
g) screw driver

Problem III^**/*****
what is the difference between the words in 1) to 7) and the words a) to g)?
1) float
2) make
3) produce
4) fly
5) write
6) think
7) speak
vs
a) fortress
b) idea
c) production
d) goods
e) article
f) booster
g) fire

Problem IV^****/*****
What is the difference between the sentences 1) to 7) and the sentences a) – g)?
1) Jason was an argonaut
2) No duplication is OK
3) How many coins did I burn?
4) A fox obstructs my plan
5) Cats and dogs don’t munch grass
6) I saw an ox and an ass working as a pair is ridiculous
7) Who says I got no guts?

vs

a) I have no money left in my purse
b) Who says I have no courage?
c) volatile movements are normal on a stock exchange
d) Who stepped first into the elevator?
e) Gardens flower in spring
f) A sunny day raises the mood
g) “to jump” is a verb

Problem V^**/*****
1) Bread can be brown
2) Bakers bake bread
3) Bookmakers bet money
4) Black is a beautiful colour
5) Bold soldiers fight on
6) Beraved of hope, the traveller sat down
7) Borrowing may cost you interest
vs
a) Shaving oneself may be a daily practice.
b) Silver is a precious metal
c) Sorry to hear that
d) Sending the message by telegraph is outdated
e) Skates can be used for matches
f) Samples are usually small
g) Singularities are abonormalities

Problem VI^****/*****
1) Dogs bark loudly in our street
2) Mom bakes a delicious cake
3) Some countries ban books
4) The dad bears the financial responsibility
5) The kids become a little bit taller every day
6) Beggars beg for food
7) Christians believe the bible is true
8) The gambler bets
9) The police blocks the street
vs
a) This fish swims in the sea
b) The spy sabotaged the factory
c) The soldier salutes the flag
d) The soccer team scored another victory
e) I searched the internet in vain
f) John sharpens the pencil
g) John shaves himself

See here for the answers ChatGPT gave.

New puzzles are usually published on Friday mornings, on the first or third Friday of the month.

10 logicians at the cafe

The two puzzles below are very easy. I am indebted to my long term friend Biep for passing this one on to me. There are some related puzzles, which you can find here and here.

Ten logicians walked into a cafe. Each knew whether they wanted tea or coffee, but no one knew each other’s preferences. When they sat at a table, the waiter asked loudly, “Will everyone be having coffee?” Then the waiter went around the table, writing down each person’s answer.
There were three possible answers: “I don’t know”, “Yes”, and “No”. All answers were truthful and spoken loudly so that all group members heard them.

I don’t know^*/*****
Suppose the first nine people said, “I don’t know”, and the tenth person said, “Yes”. How many of them wanted coffee?

6the and 7th^*/*****
Suppose the sixth and the seventh answers were not the same. How many people said, “I don’t know”, how many said, “No”, and how many said, “Yes”. Find the smallest number of people who for sure would have ordered coffee and the smallest number who for sure would have wanted tea?

You can check your solution here.

New puzzles are published at least once a month on Fridays. Solutions are published after one or more weeks. You are welcome to remark on the difficulty level of the puzzles, discuss alternate solutions, and so on. Puzzles are rated on a scale of 1 to 5 stars.

Bongard puzzle – back to math

In 1967 the Russian scientist M.M. Bongard published a book containing 100 problems. Each problem consists of 12 small boxes: six boxes on the left and six on the right. Each of the six boxes on the left conforms to a certain rule. Each box on the right contradicts this rule. Your task, of course, is to figure out the rule.

A Bongard problem consists of two groups of 6 images. Each and every of the six images on the left complies wit a certain rule. Each of the 6 images on the right does NOT comply with this rule. What is the rule?

THe title of this post already says this is a math puzzle, but you’ll first have to discover which branch of math, and than you will have to think about the one symbol which doesnt seem to fit into that branch.

Whats this?^****/*****

New puzzles are published at least once a month on Fridays. Solutions are published after one or more weeks. You are welcome to remark on the difficulty level of the puzzles, discuss alternate solutions, and so on. Puzzles are rated on a scale of 1 to 5 stars. You can check your solution here.

Bongard and history

Today we expand Bongard puzzles into the realm of history.

The Bongard puzzle below shows three boxes. Each box lists 6 or 7 historical persons. According to What secret rule(s) have they been grouped? What is the logic?

New puzzles are published at least once a month on Fridays. Solutions are published after one or more weeks. You are welcome to remark on the difficulty level of the puzzles, discuss alternate solutions, and so on. Puzzles are rated on a scale of 1 to 5 stars. You can check your solution here.

Labeled numbers (2)

Four of the five numbers below have a label consisting of three letters. Every letter stands for a property of the associated number.

Difficulty: ****/*****
The question is: what label belongs to the number in the middle?

A new puzzle is published at least once a month on Friday. You can check your solution here.

Did you like this puzzle? The good news is I wrote a booklett with dozens of these puzzles, you van find it here.

Labeled numbers

Four of the five numbers below have a label consisting of three letters. Every letter stands for a property of the associated number.

Difficulty: ****/*****
The question is: what label belongs to the number in the middle?

A new puzzle is published at least once a month on Friday. You can check your solution here.

Did you like this puzzle? The good news is I wrote a booklett with dozens of these puzzles, you van find it here.

Bongard plants puzzles

This month we move with our Bongard problems to biology, more specific to the area of plants.

If you already know how Bonmgard problems work, you can skip the explanation and go directly to the problems below.

If you don’t know what a Bongardproblem is: A Bongard problem consists of two groups of 6 (or more) items. Six on the left, and six on the right. The question is: what is the difference between the items on the left and the items on the right?
To be more precise: there is something the six items on the left have in common, while none of the items on the right have this property. What is this secret rule that the items on the left have?

1) Plants(1)^*/*****

2) Plants(2)^**/*****

3) Plants(3)^***/*****

New puzzles are published at least once a month on Fridays. Solutions are published after one or more weeks. You are welcome to remark on the difficulty level of the puzzles, discuss alternate solutions, and so on. Puzzles are rated on a scale of 1 to 5 stars. You can check your solution here.

Bongard puzzle tanach / bible (2)

This Bongard puzzle is about donkeys. What is the difference of the texts on the left and those on the right?

If you don’t have a bible, you can check them out at at biblestudies.com.

1) Donkey / ass^**/*****

Any one of the following translations are OK:
* King James Version
* New International Version
* New Revised Standard Version
I could have written them out, but I don’t want to run into copyright problems. And in tis format you can easily copy them into the weekly newsletter of your synagogue, church or sunday school.

What makes a Bongard puzzle a Bongard puzzle?
If you are used to Bongard puzzles, you may miss the 2 x 6 familiar boxes, and wonder what exactly makes a Bongard puzzle a Bongard puzzle.
In its original format, a Bongard puzzles consisst of 2 groups of 6 drawings. There is a secret rule which differentiates the two groups. Each of the drawings in one group obeys thes secret rule, while each of the items in the other group contradicts the=is rule.

The essence to me is not in the boxes. In the puzzle above I have grouped 12 texts in two rectangles with each 6 textxs. That still leaves 12 items to compare.
Are the numbers 6 and 12 essential? My answer is: No, thje system would function as well with two groups of 7 items, of with a group of 5 and a group of 8 items.
My definition of a Bongard puzzle would be:
a) There are 2 groups of items
b) Each of the items in one of the groups is an example of a secret rule.
c) Each of the items in the other group contradicts this rule.

What happens if we increase the number of groups from 2 to 3?
For example:

I would like to coin the term: ‘Bongard-like puzzle’ for these puzzles. There are clearly some Bongard puzzle features. There are secret rules for each of the three groups of numbers. The groups are mutually exclusive, just as the two groups in a Bongard pouzzle are mutually exclusive. So each of the members of the other group can be considered counter examples to the rule of the first group.

But it does depend on definition.