# List of puzzles

## Archive

Show me a random puzzle**Most recent collections**

#### Sunday Afternoon Maths LXVII

Coloured weightsNot Roman numerals

#### Advent calendar 2018

#### Sunday Afternoon Maths LXVI

Cryptic crossnumber #2#### Sunday Afternoon Maths LXV

Cryptic crossnumber #1Breaking Chocolate

Square and cube endings

List of all puzzles

## Tags

christmas crosswords differentiation arrows trigonometry squares calculus chalkdust crossnumber odd numbers surds mean lines dates triangle numbers angles bases games multiples probabilty polygons circles triangles remainders books geometry numbers star numbers chocolate factorials percentages sequences logic menace perfect numbers shape spheres sums dice floors complex numbers chess colouring digits algebra scales hexagons planes regular shapes averages advent cryptic clues quadratics dodecagons folding tube maps time area rectangles means palindromes cards volume routes symmetry integration square roots sum to infinity grids 2d shapes probability taxicab geometry crossnumbers sport wordplay coins fractions factors ellipses prime numbers integers addition proportion functions shapes irreducible numbers division speed money rugby graphs cryptic crossnumbers coordinates perimeter partitions indices clocks balancing parabolas ave pascal's triangle number people maths unit fractions square numbers 3d shapes multiplication doubling cube numbers**2018**

Advent 2018 Logic Puzzle

24 December

23 December

22 December

21 December

20 December

19 December

18 December

17 December

16 December

15 December

14 December

13 December

12 December

11 December

10 December

9 December

8 December

7 December

6 December

5 December

4 December

3 December

2 December

1 December

Cryptic crossnumber #2

Cryptic crossnumber #1

Breaking Chocolate

Square and cube endings

Equal lengths

Digitless factor

Backwards fours

Is it equilateral?

Cube multiples

**2017**

Advent 2017 logic puzzle

24 December

23 December

22 December

21 December

20 December

19 December

18 December

17 December

16 December

15 December

14 December

13 December

12 December

11 December

10 December

9 December

8 December

7 December

6 December

5 December

4 December

3 December

2 December

1 December

What's the star?

XYZ

Where is Evariste?

Bending a straw

Turning squares

Elastic numbers

Square pairs

Factorial pattern

Placing plates

**2016**

#### Advent calendar 2016

Advent 2016 murder mystery24 December

23 December

22 December

21 December

20 December

19 December

18 December

17 December

16 December

15 December

14 December

13 December

12 December

11 December

10 December

9 December

8 December

7 December

6 December

5 December

4 December

3 December

2 December

1 December

Largest odd factors

Square factorials

An arm and a leg

Blackboard sums II

Powerful quadratics

Two tangents

Blackboard sums

Hat check

Combining multiples

Cross diagonal cover problem

Lots of ones

An integral

Subsum

More doubling cribbage

Doubling cribbage

Two semicircles

What is the sum?

Between quadratics

**2015**

#### Advent calendar 2015

24 December23 December

22 December

21 December

20 December

19 December

18 December

17 December

16 December

15 December

14 December

13 December

12 December

11 December

10 December

9 December

8 December

7 December

6 December

5 December

4 December

3 December

2 December

1 December

Santa

Shooting hoops

The self referential crossword

#### Sunday Afternoon Maths VLIII

Cutting cornersRugby scores

Quarter circle

#### Sunday Afternoon Maths VLII

Shinro#### Sunday Afternoon Maths VLI

Dice maze#### Sunday Afternoon Maths VL

Integer partMake the sums

#### Sunday Afternoon Maths XLIV

Rotating round tableBalanced sets

121

#### Sunday Afternoon Maths XLIII

Ticking clockOne two three

Coloured pins

Fill in the digits

#### Sunday Afternoon Maths XLII

The taxman#### Sunday Afternoon Maths XLI

Squared circlePolygraph

#### Sunday Afternoon Maths XL

The sixth centOne hundred factorial

Two triangles

#### Sunday Afternoon Maths XXXIX

Dodexagon#### Sunday Afternoon Maths XXXVIII

Products and sums of squaresEqual side and angle

Arctan

#### Sunday Afternoon Maths XXXVII

A bit of Spanish**2014**

#### Sunday Afternoon Maths XXXVI

Square deal#### Sunday Afternoon Maths XXXV

Odd squaresHalf an equilateral triangle

Marbles

37

#### Sunday Afternoon Maths XXXIV

Find them allFour points on a shape

Algebraic fractions

Four integers

Sum

#### Sunday Afternoon Maths XXXIII

Fair diceHalf digits

Pizza

#### Sunday Afternoon Maths XXXII

FrogsThe blue-eyed sisters

1089

#### Sunday Afternoon Maths XXXI

IntegralsTetrahedral die

#### Sunday Afternoon Maths XXX

No changeDirty work

Square in a triangle

#### Sunday Afternoon Maths XXIX

Double derivativeEqual opportunity

Three squares

#### Sunday Afternoon Maths XXVIII

The ace of spades3n+1

2009

#### Sunday Afternoon Maths XXVII

SineTriangles between squares

#### Sunday Afternoon Maths XXVI

Odd and even outputsTwenty-one

#### Sunday Afternoon Maths XXV

Polya strikes outWhist

#### Sunday Afternoon Maths XXIV

Exact changeSquare cross

#### Sunday Afternoon Maths XXIII

Ten digit numberMrs. Coldcream objected

Cooked turkey

Let the passenger train through!

#### Sunday Afternoon Maths XXII

Overlapping trianglesComing and going

#### Sunday Afternoon Maths XXI

Wool circlesSum equals product

#### Sunday Afternoon Maths XX

Bézier curveFolding A4 paper

#### Sunday Afternoon Maths XIX

Multiples of threeDartboard

#### Sunday Afternoon Maths XVIII

Seven digitsParabola

#### Sunday Afternoon Maths XVII

Differentiate thisSquare numbers

N

MathsJam

#### Sunday Afternoon Maths XVI

Pocket moneyAlways a multiple?

#### Sunday Afternoon Maths XV

TennisThe mutilated chessboard

Cycling digits

Grand piano

#### Sunday Afternoon Maths XIV

SuperdogEight peas

#### Sunday Afternoon Maths XIII

Times roamin'Mean, median, mode, range

#### Sunday Afternoon Maths XII

Unit octagonLargest triangle

Circles

#### Sunday Afternoon Maths XI

Semi circle in a triangleLight work

#### Sunday Afternoon Maths X

LightsPrincess problem

Three digit numbers

#### Sunday Afternoon Maths IX

Multiple sumsDowning Street

Chessboard squares

Equal areas

#### Sunday Afternoon Maths VIII

ReboundsComplex squares

Adding bases

Reverse bases again

Two

#### Sunday Afternoon Maths VII

Reverse basesNinety nine

#### Sunday Afternoon Maths VI

Triangle numbersEllipses

#### Sunday Afternoon Maths V

Folding tube mapsx to the power of x again

Odd sums

Two lines

#### Sunday Afternoon Maths IV

x to the power of xi to the power of i

arccos + arcsin

#### Sunday Afternoon Maths III

TwentyColliding parallel people

#### Sunday Afternoon Maths II

Guess the diagonal#### Sunday Afternoon Maths I

8! minutesPyramid and tetrahedron

Circles

Pole position

Burning ropes