20 January 2019

616. Five to three squares

Easy Medium Hard Extreme


Move 4 matchsticks to create 3 squares. The squares may differ in size.

06 January 2019

615. Mathematical: 2 minus 2 is not 5

Easy Medium Hard Extreme


ADD 3 matchsticks to make the equation true. Negative numbers are not allowed and no number is greater than 9.

28 December 2018

614. Divide the shape

Easy Medium Hard Extreme


Add TWO matchsticks to the layout above to divide the area into two parts. The two parts must be equal in size and shape.

22 December 2018

613. Five to six squares

Easy Medium Hard Extreme


Move 4 matchsticks to create 6 squares. Squares may differ in size.

Show Answer

The four small squares are:
CLFE, LDGF, EFJH, FGKJ

The two big squares are:
ABGE, CDKH

Hide Answer

15 December 2018

612. Ship to Triangles

Easy Medium Hard Extreme


MOVE four matchsticks to convert the ship into eight triangles.

The triangles may differ in size and all matchsticks don't have to be flat on the surface.

Show Answer

4 big triangles:
ACH, BKD, CEJ, CJH

4 small triangles:
BCF, CDG, FKH, GJK

Hide Answer

08 December 2018

611. Heads and squares

Easy Medium Hard Extreme


If four matchstick heads form the four corners of a square, how many squares can you identify in the layout above? Squares my differ in size.

Be warned, this is not so easy!

Show Answer

There are 11 squares

Small: ABED, CDHG, DEJH, EFKJ, HJML
Medium: CAEH, BFJD, KMHE, LGDJ
Big: CBKL, AFMG

Hide Answer

01 December 2018

610. Mathematical: 9 minus 6 is not 4

Easy Medium Hard Extreme


MOVE 3 matchsticks to make the equation true.

There are four possible answers. Getting one solution within 30 seconds makes you good. Getting four solutions within three minutes makes you brilliant!

24 November 2018

609. Five to two squares

Easy Medium Hard Extreme


There are 5 equal squares in the layout above. Move 6 matchsticks to reduce the number of squares to two. The two squares MUST be different in size.

17 November 2018

608. Spot the twins

Easy Medium Hard Extreme


How long does it take you to spot the two identical triangles?

Show Answer

Numbers 3 and 8 are identical.

Hide Answer

12 November 2018

607. Mathematical: 4 - 0 is not 7

Easy Medium Hard Extreme


ADD 5 matchsticks to make the equation true. No number may be greater than 9 or negative.

04 November 2018

606. Nodes: 4 matchsticks

Easy Medium Hard Extreme


There are 4 nodes in the layout above (the circles) and the node value is 8. A node can therefore be described as the touching point of two or more matchsticks OR the two ends of a matchstick. A matchstick head has a value of 2 and the opposite side a value of 1.

How would you place 4 matchsticks to create a node value of exactly 20?

28 October 2018

605. Five matchsticks in a row

Easy Medium Hard Extreme


Five matchsticks are placed with heads pointing North as shown above. The challenge is to turn ALL the matchsticks so that all the heads are pointing South. The following rules apply when turning:

1. Turn 3 matchsticks at a time.
2. The 3 matchsticks you turn don't have to be adjacent.

Can you achieve this in 3 steps?

13 October 2018

603. Move 3 to create 2 rhombuses

Easy Medium Hard Extreme


Move 3 matchsticks to create 2 rhombuses. (also known as diamonds) The 2 rhombuses must be equal in size.

06 October 2018

602. Divide into equal parts

Easy Medium Hard Extreme


Place 7 matchsticks inside the layout above to form 3 equal shapes. The 3 shapes must be equal in shape and size.

29 September 2018

601. Rectangle 3X2: Remove 6

Easy Medium Hard Extreme


TAKE AWAY 6 matchsticks to create 2 squares. The 2 squares must not be equal in size.

15 September 2018

600. The clock and the number

Easy Medium Hard Extreme


Beware, another sneaky one!

Where would you ADD one matchstick to make the statement true?

Show Answer

3H43 is the same as 17 TO 4!

Hide Answer

08 September 2018

599. Mathematical: 3 minus 9 is not 9

Easy Medium Hard Extreme


TAKE AWAY 5 matchsticks to make the equation true. Can you find both solutions?

25 August 2018

598. Three squares and four rectangles

Easy Medium Hard Extreme


There is one square and one rectangle in the layout above. ADD 6 matchsticks to form three equal squares and four equal rectangles.

Show Answer

The four equal rectangles are easy to identify, but the three equal squares are:

ACHK, BDGJ and CEFH

Hide Answer

15 August 2018

11 August 2018

596. M for Matchstick

Easy Medium Hard Extreme


Add 2 matchsticks to form 10 triangles. The matchsticks may overlap and do not have to be flat on the surface.

Show Answer

There are 4 Small triangles:

ALK
BCM
OME
LOJ

There are 6 combined triangles

AJH
BDE
LEF
MJF
KOH
CDO

Hide Answer

28 July 2018

595. Polygon with 8 sides

Easy Medium Hard Extreme


Shown above is a seven sided convex polygon built from 2 squares and 3 triangles. 12 matchsticks were used to achieve this. The outside angles are all greater than 180 degrees as illustrated with angle "a" above.

Create your own convex polygon. The following rules apply:

1. Polygon must have 8 sides
2. 17 matchsticks to be used
3. All outside angles to be greater than 180 degrees
4. There must be 6 equal sized triangles
5. There must be 2 equal sized squares
6. All matchsticks must be flat on the surface.

14 July 2018

594. Mathematical: 8 minus 3 is not 3

Easy Medium Hard Extreme


MOVE only 1 matchstick to make the equation true. Can you find the 3 solutions?

07 July 2018

593. Divide into 3 shapes

Easy Medium Hard Extreme


Add 4 matchsticks to divide the triangle into 3 equal parts. The 3 parts may differ in shape but must be equal in size.

Show Answer

If the length of 1 matchstick is 1 unit, the size of the big triangle (A + B + C + D) is:
= 1/2 X 4 X 3
= 6 square units

The size of rectangle A is:
= 2 X 1
= 2 square units

The size of triangle B is:
= 1/2 X 1 X 2
= 1 square unit
But C = B based on the same calculation which results in B + C = 2 square units.

Size of part D is:
= Big triangle - size A - size B - size C
= 6 - 2 - 1 - 1
= 2 square units

It should be clear that A = D = (B + C)

Hide Answer

01 July 2018

592. Increase the inner triangles

Easy Medium Hard Extreme


This puzzle is similar to but different from No 517.

In the figure above 8 matchsticks were placed on a grid to form 6 inner triangles.

What is the maximum number of inner triangles you can create by rearranging the 8 matchsticks?