Below you see ten coins in a row.
The goal is to make five piles of two coins.
You must, however, jump over two other coins (these can be two coins next to each other,
but also two piled coins!) to place a coin on top of another coin.
You may jump only with coins that have not been piled yet.

The Question:
How can this be done?

A Hint :
By clicking on the small arrows, you can move the coins in the desired direction.

Peasant Janet kept six pigs in six pens of equal size,
made with thirteen wooden fences (see the picture below).

One night, there was a terrible storm, in which one of the thirteen fences was badly damaged.
Janet rearranged the remaining fences so that the six pigs still each had pens of equal size.

The square cards below must be arranged into one large square.
Two cards may, however, only be laid against each other if the (half) suns are of the same color.

The Question:
How can this be done?

A Hint :
You can drag the cards over the field using your mouse.
It is also possible to move all cards together by "dragging" the field.

Take a coin from your wallet (a 1 or 2 Euro piece works best).

Take a piece of paper and cut a circular hole in it middle, which is slightly smaller than the size of the coin
(a diameter which is roughly 80% of the diameter of the coin, see picture).

The Question:
How can you get the coin through the hole without breaking or cutting the paper?

The Eighth Question:
The figure below contains five squares (four small ones and a large one).
Can you form seven squares by moving just two sticks, without having overlapping sticks?

The pattern of coins shown on the left must be transformed into the pattern shown on the right, by moving exactly three coins,
where at the end of each move each coin needs to touch with at least two other coins.
The coins must be moved flat on the table (coins cannot move over each other).

In this game, there are 32 pieces in a playing field with 33 places.
You can only jump over a piece, if there is a free place directly behind this piece.
You may jump horizontally or vertically.
Every piece that has been jumped over, is removed from the field.
The goal of this game is to leave exactly one piece, in the middle of the playing field.

The Question:
How can this be done?

A Hint :
By clicking on the small arrows, you can move the pieces in the desired direction.

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