What is the missing number
in Triangle Four?
Our
Solution:
The product of the two largest
minus the square of the smallest,
So the missing number is 45-16 = 29
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Seven matchsticks form two squares as shown in the illustration. Move
three matchsticks to get three squares. You can rotate matchsticks, but you
can't overlap and/or damage them.
Our Solution:
The solution is shown in
this illustration:
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There are five squares (one 3x3 and four 1x1) formed with 20
matchsticks, as shown in the illustration. Move two matchstick to get seven
squares. Overlapping or breaking of matchsticks or "loose ends" are
not allowed.
Our Solution:
Seven...
The diagram shows 3 squares
and 2 triangles.
Rearrange the matches to make 5 squares and 6 triangles.
Our
Solution:
Note that there are four
small squares and four small triangles. Can you also see the large square and
the...
Horace and the Doughnut Puzzle - Solution
Hungry Horace has bought a large doughnut to share with his friends at a party. Horace has invited eight people to his house, including Greedy Graham and Fat Freda. The doughnut has a hole in it...
Game For A Half Puzzle - Solution
If you cut the shaded shape A into two pieces in a certain way, you can then make all the other shapes (B, C, D, E, F, G) from those two pieces.
How do you cut shape A?
Our
Solution:
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Circling The Square Puzzle - Solution
In the diagram below, each circle is just big enough to touch all four sides of the square. The area of the square is therefore just a bit more than the area of one of the circles.
I want to...
Re-arrange the five pieces to make a square.
Is there more than one way?
Our
Solution:
I have only found one solution excluding reflections and rotations:
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There are three different color cylindrical vessels: Blue, Red, and Green, with the sizes, as shown.The Red vessel is put into the Blue one, and the Green vessel into the Red one as shown.Each vessel is full of water.Which vessel contains...
Ten Coins in Five Rows Puzzle - Solution
The arrangement below shows
10 coins in three rows of four.
Your task is to re-arrange the same ten coins to make FIVE rows
of four.
Each line must be straight and must contain exactly four coins.
Our
Solution:
The...
Measuring 8, 8 and 8 Puzzle - Solution
The
Puzzle:
You have a full bucket containing 24 liters of liquid.
You also have three empty buckets: one of 5 liters, one of 11 liters, and one
of 13 liters.
How could you divide the 24 liters of liquid into three equal parts, so that
you have three...