Puzzles 44 - Puzzle Prime

Borromean Rings

Section: Brain Teasers Category: Mathematics

Difficulty: Hard Tags: Geometry

Borromean rings are rings in the 3-dimensional space, linked in such a way that if you cut any of the three rings, all of them will be unlinked (see the image below). Show that rigid circular Borromean rings cannot exist.

SOLUTION

Assume the opposite. Imagine the rings have zero thickness and reposition them in such a way, that two of them, say ring 1 and ring 2, touch each other in two points. These two rings lie either on a sphere or a plane which ring 3 must intersect in four points. However, this is impossible.

Unknown Author April 9, 2020

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Slice My Head

Section: Casual Puzzles Category: Riddle

Difficulty: Easy

You use a knife to slice my head,
And weep beside me when I’m dead.

What am I?

SOLUTION

The answer is ONION.

Unknown Author April 6, 2020

0 Comments

Puzzle Sum 21

Section: Casual Puzzles Category: Rebus

Difficulty: Easy

What animal does this sum spell?
What fish does this sum spell?

SOLUTION

BAR + MUFF – ARM + BUS + HALO – BUSH = BUFFALO
SHAWL – AWL + ARK = SHARK

Sam Loyd April 3, 2020

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Seven Sevens

Section: Brain Teasers Category: Mathematics

Difficulty: Advanced Tags: Cryptarithm

Seven sevens are given. Find the other digits in this multiplication.

SOLUTION

The answer is:

21817 x 96787 = 2111601979

Leonid Mochalov March 31, 2020

2 Comments

City of Light

Section: Casual Puzzles Category: Maze

Difficulty: Medium

Get from START to END in this watercolor maze, created by Sean Jackson.

SOLUTION

The solution is shown below.

Sean Jackson March 27, 2020

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Hidden Objects Piles

Section: Casual Puzzles Category: Hidden Objects

Difficulty: Medium

Can you find the objects which are hidden in the images below?

SOLUTION

The solution is shown below.

Vook March 24, 2020

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Movie Conundrums 1

Section: Casual Puzzles Category: Rebus

Difficulty: Easy Tags: Movie Conundrums

Can you recognize which famous movies are depicted by these images?

SOLUTION

The Dark Knight Rises
No Country for Old Men
The Silence of the Lambs

Puzzle Prime March 21, 2020

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Fastest Stalemate

Section: Brain Teasers Category: Chess

Difficulty: Expert

Can you design a chess game that ends up with a stalemate in the 10th move?

SOLUTION

One possible game is:

1. h4 h5
2. c4 a5
3. Qa4 Ra6
4. Qxa5 Rah6
5. Qxc7 f6
6. Qxd7 Kf7
7. Qxb7 Qd3
8. Qxb8 Qh7
9. Qxc8 Kg6
10. Qe6

Sam Loyd March 18, 2020

2 Comments

Flat as a Leaf

Section: Casual Puzzles Category: Riddle

Difficulty: Medium

It is flat as a leaf, round as a ring,
Has two eyes, yet cannot see a thing.

What is it ?

SOLUTION

The answer is BUTTON.

Unknown Author March 15, 2020

6 Comments

Broken Window

Section: Brain Teasers Category: Insight

Difficulty: Easy

One snowy night, Sherlock Holmes was in his house sitting by a fire. All of a sudden a snowball came crashing through the window, breaking it. Holmes got up and looked out just in time to see three neighborhood kids who were brothers run around the corner. Their names were John Crimson, Mark Crimson, and Paul Crimson.

The next day Holmes got a note on his door that read:

“? Crimson. He broke your window.”

Which of the three Crimson brothers should Sherlock Holmes question about the incident?

SOLUTION

He should question Mark. The note read: “QUESTION MARK Crimson. He broke your window.”

Unknown Author March 12, 2020

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