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Levels of difficulty

⭐
very easy

⭐⭐
easy

⭐⭐⭐
normal

⭐⭐⭐⭐
hard

⭐⭐⭐⭐⭐
very hard

Trapezoid/trapezium made with seven matchsticks.

Puzzle #1
⭐⭐

The number four hundred three made with fifteen matchsticks.

Puzzle #2
⭐⭐⭐

A big square divided into four congruent small squares made with twelve matchsticks.

Puzzle #3
⭐⭐⭐

An isosceles triangle where the base is divided into two equal parts by a dot and the two equal sides are divided into three equal parts by two dots. A green kite is inside the triangle where the top vertex coincides with the vertex of the triangle and the other vertices are the two top dots of the equal sides and the dot in the base of the triangle.

Puzzle #4
⭐⭐⭐

Two squares, one red and the other yellow, meet at the center/centre of a circle. The red square is smaller than the yellow square. The yellow square is labeled/labelled twenty.

Puzzle #5
⭐⭐⭐

Three stacked circles with different radii are inside a big circle, all tangent with each other. In the top it is the small circle, labeled/labelled pi. The medium circle is between the small circle and the bigger circle, it passes through the center/centre of the big circle and it is labeled/labelled four pi. The bigger circle is below the medium circle and it passes also through the center/centre of the big circle.

Puzzle #6
⭐⭐

Four dominoes, each one with the number of spots, from left to right, from top to bottom: six and one, two and five, three and three, and question mark and question mark.

Puzzle #7
⭐⭐⭐⭐

Four dominoes forming a square, each one with the number of spots, clockwise direction: two and three, three and one, one and four, and four and two. The number twenty is inside the square.

Puzzle #8
⭐⭐⭐

A multiplication using dominoes. A horizontal and a vertical dominoes represent the multiplicand and the multiplier. The horizontal domino has a number of spots, from left to right, four and question mark, forming part of the multiplicand. The vertical domino has the number of spots, from top to bottom, five and question mark, the first number of spots forms part of the multiplicand and the question mark is the multiplier. The product is represented by two horizontal dominoes, side by side. The first one has the number of spots, from left to right, one and question mark, and the second one has the number of spots, from left to right, four and five.

Puzzle #9
⭐

A three by three crossnumber grid.

Puzzle #10
⭐

A four by four crossnumber grid.

Puzzle #11
⭐⭐

A five by five crossnumber grid.

Puzzle #12
⭐⭐⭐

Four.

Puzzle #13
⭐⭐

Two thousand and fourteen.

Puzzle #14
⭐⭐⭐

Two thousand and fourteen.

Puzzle #15
⭐⭐⭐⭐

Two concentric circles, a small one and a big one. A square is inscribed into the big circle and the small circle is inscribed into the square.

Puzzle #16
⭐⭐⭐

A pig's face is represented with a big circle. Its snout is a small circle that passes through the center/centre of the big circle and is tangent to it.

Puzzle #17
⭐

Two squares, one is small and the other is big. One of the sides of the big square starts in the top right vertex of the small square and finishes at the left side of the small square. The distance between the bottom left vertex of the small square and the left vertex of the big square is labeled/labelled one. The horizontal distance between the left and the right vertices of the big square is represented by a double arrow and is labeled/labelled nine.

Puzzle #18
⭐⭐⭐

A white circle passes through the center/centre and the rightmost point of a yellow semicircle. A vertical arrow from the topmost point the semicircle to the bottommost point of the circle is labeled/labelled six.

Puzzle #19
⭐⭐⭐

A square with four quarters of circles, one in each of its vertices. A red rectangle is at the center/centre of the square such that each of its vertices belongs to a quarter of circle. A vertical double arrow with the length of the square's side is labeled/labelled ten.

Puzzle #20
⭐⭐⭐⭐⭐

A square with a green isosceles triangle inside. The triangle has one vertex at the top left vertex of the square and the other two vertices in the bottom and right side of the square such that they are equidistant from the first vertex. A vertical double arrow with the length of the square's side is labeled/labelled six.

Puzzle #21
⭐⭐⭐

The number four hundred thirty nine made with fifteen matchsticks.

Puzzle #22
⭐⭐⭐

Twenty nine multiplied by four is equal to thirty three made with twenty nine matchsticks.

Puzzle #23
⭐⭐

Three plus nine made with matchsticks.

Puzzle #24
⭐⭐

A right/right-angled triangle with a horizontal and a vertical side. The vertical side and the hypotenuse are labeled/labelled three and five, respectively. The horizontal side has a semicircle that is tangent to the hypotenuse.

Puzzle #25
⭐⭐⭐⭐

Three squares: one big, one medium labeled/labelled nine and one small labeled/labelled one. The big square right bottom vertex is aligned with the medium square's base. The small square is on the top left of the medium square. The bottom left vertex of the big square and the top right vertex of the small square are the same. The top right vertex of the medium square touch the bottom side of the big square.

Puzzle #26
⭐⭐⭐

A circle labeled/labelled one hundred sixty nine pi is aligned with the a square's base and tangent to its top right vertex. A double arrow from the square's bottom right vertex and the rightmost point of the circle is labeled/labelled twenty five.

Puzzle #27
⭐⭐

A circle and a square. The top vertices os the square lie in the circle. The bottom side of the square is tangent to the circle. A horizontal double arrow represents the diameter of the circle and is labeled/labelled ten.

Puzzle #28
⭐⭐

An equilateral triangle has three semicircles inside it that are tangent to its transversal sides. A horizontal double arrow that represents the length of the base of the equilateral triangle is labeled/labelled four.

Puzzle #29
⭐⭐⭐⭐⭐

A Christmas tree made with six congruent regular hexagons.

Puzzle #30
⭐⭐⭐⭐

Three candles in increasing height, from left to right.

Puzzle #31
⭐⭐

A big equilateral triangle made with nine matchsticks, with side length three. Three small equilateral triangles are made with three matchsticks in each vertex of the big equilateral triangle.

Puzzle #32
⭐⭐

An arbelos with the distance between two points in a tangent line to the two smaller semicircles. The distance is showed as a double arrow labeled/labelled four.

Puzzle #33
⭐⭐⭐⭐


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