20 August 2017

541. The TOWN named OE

Easy Medium Hard Extreme


Ōe is a town in Yamagata, Japan.

Remove 2 to leave 1. (Yes, think differently about this one!)

Show Answer

Look at every second letter. It spells the words TWO and ONE. Removing TWO leave you with ONE.

Hide Answer

19 August 2017

540. Two triangles

Easy Medium Hard Extreme


Move 3 matchsticks to create 2 triangles. The triangles may differ in size.

13 August 2017

539. Rectangle 4X3: Remove 4 to leave 10 squares

Easy Medium Hard Extreme


TAKE AWAY 4 matchsticks to leave 10 equal squares.

Show Answer

There are also other solutions.

Hide Answer

12 August 2017

538. Mathematical: 5 plus 1 is not 2

Easy Medium Hard Extreme


MOVE 3 matchsticks to make the equation true. Can you find all 3 solutions?

06 August 2017

537. Reduce the area to 8

Easy Medium Hard Extreme


This puzzle is similar to but different from number 479.

If the length of 1 matchstick is 1 unit, the area of the shape above is 12 square units. Move 8 matchsticks to reduce the area to 8 square units.

05 August 2017

536. Seven sections

Easy Medium Hard Extreme


Add 3 matchsticks to the layout above to create 7 sections with each section holding 1 broken matchstick each.

30 July 2017

535. Smallest number

Easy Medium Hard Extreme


TAKE AWAY 3 matchsticks to form the SMALLEST possible number.

29 July 2017

534. Count the triangles

Easy Medium Hard Extreme


How many triangles in the figure above?

Show Answer

There are 15 triangles in total.

Size 1X1: 3 (BED, CFE and EJH)
Size 2X2: 4 (AFD, CKH, BJG and ENM)
Size 3X3: 4 (AKG, COM, BNL and ERQ)
Size 4X4: 3 (AOL, CSQ and BRP)
Size 5X5: 1 (ASP)

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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

You can place the broken matchstick with head on any of the open places as long as it does not form a row (horizontal, vertical or diagonal).

Below is one example:
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).

Hide Answer

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.

Hide Answer

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)

Hide Answer

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.

Hide Answer

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

Hide Answer

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.

Hide Answer

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.

Hide Answer

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.