002_Logic Puzzles

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Logic Puzzles

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Stellargrams

Dive into a Stellargram, where hexagons hold the key to cosmic success! With just six numbers and boundless possibilities, you'll navigate a galaxy of mind-bending challenges.

Movie Quote Hanjie

The numbers at the top and side of this nonogram puzzle indicate squares - or groups of consecutive squares - that are to be shaded in. For example the numbers 5,3 tell you that there is a group of 5 and a group of 3 squares to be shaded, with at least one unshaded square between them.

Once you have identified and shaded all the right squares, the remaining letters will spell out a quote from a famous movie.

Hanjie

The numbers at the top and side of this Hanjie puzzle indicate squares - or groups of consecutive squares - that are to be shaded in. For example the numbers 5,3 tell you that there is a group of 5 and a group of 3 squares to be shaded, with at least one unshaded square between them.

Once you have identified and shaded all the right squares, a picture will emerge.

Shikaku

Divide the Shikaku grid into rectangles. Each rectangle must contain a single number, and that number must describe exactly how many boxes there are in the rectangle.

Masyu

Draw a line around the grid that passes through ALL the black and white dots before joining up with itself to make a continuous loop.

Your line can pass through or turn left or right in empty squares, but there are rules for squares containing dots. Your line cannot cross over itself, branch o , or go through the same square twice.

Missing Link

So that the grid follows a logical pattern, what exactly should occupy the squares at a, b and c?

Safecracker

To open the safe, all 20 of the buttons must be pressed in the correct order (which is indicated by the numbers and directions on the buttons) before the “open” button is pressed. What is the rst button pressed in your sequence?

See Saw

Each of the five different coloured balls represents a different weight - 1, 2, 3, 4 or 5 kilos. Can you work out which balls weighs what, and how many yellow balls will balance the final scale?

Grid Lock

There is a pattern behind the placement of the shapes and colours within the grid. Can you identify the pattern, and work out which of the squares below correctly fills the vacant space?

Which Wheel

There are exactly six ways to arrange four colours on a wheel. Which of the wheels: a, b, c, or d, completes the full set of colour combinations?

Sum People

Each of the characters in this sum box represents a different number, with the sum of all the numbers at the end of each row and column. Can you work out which number is each character represents and fill in the question mark?

Minesweeper

Each number in the grid indicates the exact number of black squares that should surround it. Shade the empty squares until all the numbers are surrounded by the correct number of black squares.

Patchwork

This patchwork is in three colours - blue, purple and red. If we don’t want any same-coloured pieces to share a border, what colour will the pieces at a and b be?

Suguru

Each cell in an outlined block must contain a digit: a two-cell block contains the digits 1 and 2, a three-cell block contains the digits 1, 2 and 3; and so on. No same digit appears in neighbouring cells, not even diagonally.

Cell Blocks/Shikaku

Divide the grid into blocks that are either square or rectangular. Each block must frame a single number, and each block must contain the same number of cells as the number it frames.

Venn Diagram

Can you work out which areas of this diagram represent green flags with red stars but no stripes, and red and green striped flags with no stars?

Logic Gates

Puzzles involving boolean circuits and electronic logic gates.

Cubism

This cut-out shape can be folded to make a cube. Which of the four cubes below is the only one it could make?

Block Party

This used to be a big cube made of 125 small blocks measuring 5 by 5 by 5. If all the blocks that are not visible from this angle are present, can you work out how many have been taken away?

Binairo

1. Complete the grid with zeros and ones until there are just as many zeros and ones in every row and every column.

2. No more than two of the same number can be next to or under each other.

3. Rows or columns with exactly the same content are not allowed.

Battleships

The numbers on the side and bottom of the grid indicate occupied squares or groups of consecutive occupied squares in each row or column. Can finish the grid so that it contains three Cruisers, three Launches and three Buoys and the numbers tally?

Psycho Games

Synaptic Puzzles to enhance mental flexibility.

Bridges

Connect the islands up so that they have the number of bridges shown.

Battery Pack

Each rectangle contains either a battery with a positive (+) and negative (–) pole OR a dud wooden block which does nothing. The numbers along the top and left indicate how many positive poles there are in that row or column; likewise for the other numbers showing the number of negative poles.

Baker Street Puzzle Strip

A detective cartoon strip incorporating a taxing problem, based on the tales of Sherlock Holmes by Conan Doyle.

Knot Puzzles

Entertaining and perplexing rope puzzles.

Matchstick Puzzles

Baker Street Puzzles

Join the famous detective Sherlock Holmes and his trusty colleague, Doctor Watson, in the many problems, dilemmas, and mysteries they encounter while trying to apprehend the infamous Professor Moriarty and other fiendish felons.

Uncover plots, reveal murderers, unmask liars and recover stolen goods, as you complete these lively logic puzzles, codes, anagrams, number puzzles, and of course, who dunits. Use your deductive powers to right wrongs and prevent crimes, while you deal with the esteemed Inspector Lestrade of Scotland Yard, Mrs. Hudson, Holmes’ household manager, and all the other characters you’ll encounter in and around 221B Baker Street.

Think Tank

Weekly puzzle problems devised David J. Bodycombe, Games consultant and puzzle writer; currently Question Editor for BBC4's Only Connect and author of Penguin Sudoku books.

Traffic Lights

Complete the grid so that each row and column contains a red, orange and green light. The lights at the end of each column and row tell you the colour of the red light you will meet if you travel in that direction down the column or row.

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String & Knot Puzzle 004

Which ring of string is unknotted: A or B?

From Sarcone's String & Knots Puzzles series.
©Archimedes Lab. Dist. Knight Features. All rights reserved.

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Pythagorize-It!

This game, involving square patterns, is a tribute to the Greek mathematician Pythagoras and was designed to stimulate your visuospatial skills!

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Sum People

Alphabetti Confetti

From the given clues, in no particular order, find the five 5-letter answers. Fit each answer into one of the rows of dots, so that every same-coloured dot contains the same letter. What's the seven letter word?

Clues: Light beer. Firearm. Queenly.

Look daggers. Substantial

Dice Maze

Each colour represents a direction (up, down, left or right) and the number of dots on each die tell you how far to go. Starting in the middle die of the maze, follow the directions correctly and you will visit every die in turn once only. Which dice is the last you visit on your trip?

Venn Diagram

Can you work out which areas of this diagram represent striped fresh water flat fish that don’t have dorsal fins, and salt water flat fish that have dorsal fins but not stripes?

Battleships

The numbers on the side and bottom of the grid indicate occupied squares or groups of consecutive occupied squares in each row or column. Can you finish the grid so that it contains three Trawlers, three Tugs and three Buoys so that the numbers tally?

Cha Cha Cha

The twenty steps that make up this dance end with the
Red Step. Can you trace back the sequence from there and
work out which was the very first step in the dance?

Chess

Can you place a queen, a bishop, a knight and a rook on this chessboard that the red squares are attacked by exactly two pieces, the green ones by 3 pieces and the yellow ones by 4 pieces?

Missing Link

Cubism

This cut-out shape can be folded to make a cube.
Which of the four cubes below is the only one it could make?

Block Lock

Which two of these block piles could be fitted neatly together to make a perfect 3 x 3 x 3 cube?

Block Party

This used to be a big cube made of 125 small blocks measuring 5 by 5 by 5. If all the blocks that are not visible from this angle are present, can you work out how many have been taken away?

Cross Check

Complete the six equations, three across and three downwards, by fitting all the digits from 1 to 9 into the empty green squares.

Lotto

This week’s big Lotto numbers are in. The five winning balls are all even numbers, none of them are green and none of them contains the number 3 or is divisible by 4. Can you find the fortunate five?

Double Maze

Make your way from A to B without passing through any blue squares - Then come back without passing through any green squares!

Cube Route

Each of the four different coloured spots on the cube represents a direction - Up, Down, Left or Right. Can you work out which colour represents which direction and make your way from a to b?

The blue arrow tells you which way is up...

MInesweeper

Each number in the grid indicates the exact number of black squares that should share borders with it. Shade the empty squares until all the numbers are surrounded by the correct number of black squares. Don’t shade any numbered squares, and there is only one solution.

Number Square

Complete the Number Square so that the numbers 1 to 25 are all in the grid, and all rows and columns add up to the totals indicated to the right and below.

Par Four

You have four shots in which to get your golf ball upwards from the tee to the hole. Choose one each from the Drive, Iron, Chip and Putt selections. Each shot goes straight from the starting to finishing square. Only one combination will get you in the hole and you may never land off the grid, in a tree or in a bunker.

Patchwork

These patchwork is in three colours - blue, purple and red. If we don’t want any same-coloured pieces to share a border, what colour will the pieces at a and b be?

Safecracker

See Saw

Each of the five different coloured balls represents a different weight - 1, 2, 3, 4 or 5 kilos. Can you work out which balls weighs what, and how many yellow balls will balance the final scale?

Shikaku

Divide the Shikaku grid into rectangles. Each rectangle must contain a single number, and that number must describe exactly how many boxes there are in the rectangle.

Traffic Lights

Complete the grid so that each row and column contains a red, orange and green light. The lights at the end of each column and row tell you the colour of the first light you will meet if you travel in that direction down the column or row.

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Crosswords

Puzzle Pages

Word Puzzles

Mazes & Labyrinths

Visual Puzzles

Logic Puzzles

Games

Suduko & Sudoku-Style Puzzles

Number Puzzles

Digital Games & Puzzles