23 July 2017

533. Reversed Tic-Tac-Toe

Easy Medium Hard Extreme


You are playing REVERSED Tic-Tac-Toe. This means the LOSER is the first player with 3 in a row (horizontal, vertical or diagonal).

The next move is yours. Where would you place the broken matchstick with head to guarantee yourself a win?

Show Answer

Place your broken matchstick in the middle top row as shown above. The other player can now only play position 3. (1 or 2 would make him/her a loser). Thereafter your move could be 1 or 2.

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22 July 2017

532. The 3 square matchsticks

Easy Medium Hard Extreme


The matchsticks cover an area of 3 square matchsticks. Unfortunately 2 of the matchsticks have not been used. Move 4 matchsticks to still cover an area of 3 square matchsticks, but now all the matchsticks must be used.

16 July 2017

531. Move 4 to create 6 squares

Easy Medium Hard Extreme


Move 4 matchsticks to form 6 squares. The squares may have different sizes.

Show Answer

There are 4 small squares and 2 bigger squares (ACGE and BDHF).

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15 July 2017

530. Square 3X3: Remove 6 leaving 5 squares

Easy Medium Hard Extreme


There are 14 squares in the figure above: 1 big square (3X3), 4 smaller squares (2X2) and 9 small squares (1X1).

Take away 6 matchsticks to form 5 EQUAL squares.

08 July 2017

529. Take away 4 to leave 7 squares

Easy Medium Hard Extreme


Take away 4 matchsticks to leave 7 EQUAL squares.

Show Answer

There are also other solutions.

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06 July 2017

528. Mathematical: 8 minus 2 is not 4

Easy Medium Hard Extreme


The equation is not true, but move 3 matchsticks to make it true.

Can you find all 3 solutions?

25 June 2017

527. Windmill to 8 triangles

Easy Medium Hard Extreme


Convert the windmill to 8 triangles by moving 3 matchsticks. The 8 triangles may differ in size.

Show Answer

There are 6 small triangles and 2 bigger triangles. (ACE and BFD)

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24 June 2017

526. Move 4 to create 2 squares

Easy Medium Hard Extreme


Move 4 matchsticks to create 2 squares. The 2 squares don't have to be equal in size.

23 June 2017

525. Move 3 to create 9 squares

Easy Medium Hard Extreme


Move 3 matchsticks to create 9 squares. The squares must be equal in size.

17 June 2017

524. Invalid Roman numeral

Easy Medium Hard Extreme


Think out of the box...

What you see above is an invalid Roman numeral. Move 5 to form TWO.

16 June 2017

523. Balance the scale: Add 1

Easy Medium Hard Extreme


The vertical matchsticks on the scale all have the same weight. To balance the scale you need to add 1 more matchstick. Where would you place it?

Show Answer

In the original puzzle:
Left of balancing point: 4 + 2 + 1 + 1 = 8 units
Right of balancing point: 3 + 3 + 4 = 10 units

From the above we can see we need to add 2 more units to the left of the balancing point. This is done by placing the matchstick as shown in the solution.

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10 June 2017

521. Three numerical rows

Easy Medium Hard Extreme


The letters in each of the 3 rows represent a series of numbers. Can you figure out the numbers of each row?

Show Answer

The letter in each row is the FIRST letter of:

Row 1: One, Two, Three, Four
Row 2: Ten, Twenty, Thirty, Forty
Row 3: Hundred, Two hundred, Three hundred, Four hundred

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03 June 2017

520. Equal to two

Easy Medium Hard Extreme


Another sneaky one...

Move 1 matchstick to equal the number two.

02 June 2017

519. Move 1 to create 2 squares

Easy Medium Hard Extreme


This puzzle is really easy, but many people struggle to see the answer immediately! How long does it take you?

Move only 1 matchstick to create 2 squares.

27 May 2017

518. Rectangle 4X3: Remove 3 to leave 9 squares

Easy Medium Hard Extreme


Remove 3 matchsticks to form 9 squares. The 9 squares must all be of size 1X1. There may not be any squares of size 2X2 or 3x3.

Show Answer

There are also other solutions.

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21 May 2017

517. Increase the inner triangles

Easy Medium Hard Extreme


In the figure above 10 matchsticks were placed on a grid to form 8 inner triangles.

What is the maximum number of inner triangles you can create by rearranging the 10 matchsticks?

Show Answer

The maximum number of triangles is 14.

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19 May 2017

516. Triangle 3X3: Take away 3 to leave 6 triangles

Easy Medium Hard Extreme


TAKE AWAY 3 matchsticks to leave 6 triangles. The triangles must all be equal in size.

07 May 2017

514. Divide square into 4 equal parts

Easy Medium Hard Extreme


This puzzle is similar to but different from Number 507.

Add 10 matchsticks to the 4X4 square above to divide it into 4 equal parts. The 4 parts are allowed to have different shapes but the sizes must be exactly the same. No matchsticks may be broken.

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There are also other solutions.

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06 May 2017

513. Rectangle 4X3: Remove 4 to create 8 squares

Easy Medium Hard Extreme


There are 20 squares in total in the layout above:

2 of size 3X3 (ADUR and BEVS)
6 of size 2X2 (ACNK, BDOM, CEPN, FHTR, GJUS and HLVT)
12 of size 1X1

Take away 4 matchsticks to leave only 8 squares all equal in size.

05 May 2017

512. The 7 small triangles

Easy Medium Hard Extreme


Shown above are 3 triangles of size A and 1 small triangle of size B.

ADD 3 matchsticks to create 7 small triangles of size B and 3 of size A. The full length of each matchstick must form part of a triangle or triangles. All triangles don't have to be flat on the surface.

01 May 2017

511. Only 1 head in each node

Easy Medium Hard Extreme


The place where 2 or more matchsticks meet is called a node. How many matchsticks can you add to the grid above so that you only have 1 matchstick head in each node?

Show Answer

You can add 5 more matchsticks (in grey).

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30 April 2017

510. Take away 4 to leave 5 squares

Easy Medium Hard Extreme


TAKE AWAY 4 matchsticks to leave only 5 squares. All squares must be linked.

23 April 2017

22 April 2017

508. Move 2 to create 6 squares and 4 rectangles

Easy Medium Hard Extreme


Move only 2 matchsticks to create 6 squares and 4 rectangles. The following rules apply:

1. Squares must be equal in size
2. Rectangles must be equal in size
3. Not all squares or rectangles have to be connected

Show Answer

It is easy to see the 6 equal squares. The 4 equal rectangles are ACGE, BDHF, JLPN and KMQO.

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