Climbing Snail

A snail is at the bottom of a 20 meters deep pit. Every day the snail climbs 5 meters upwards, but at night it slides 4 meters .

The Question: How many days does it take before the snail reaches the top of the pit?

The Answer: Climbing Snail

On the first day, the snail reaches a height of 5 meters and slides down 4 meters at night, and thus ends at a height of 1 meter.
On the second day, he reaches 6 meters, but slides back to 2 meters.
On the third day, he reaches 7 meters, but slides back to 3 meters.
...
On the fifteenth day, he reaches 19 meters, but slides back to 15 meters.
On the sixteenth day, he reaches 20 meters, so now he is at the top of the pit!
Conclusion: The snail reaches the top of the pit on the 16th day!...

Hans & Gerrie

Hans is standing behind Gerrie and at the same time Gerrie is standing behind Hans.

The Question: How is this possible?

The Answer: Hans and Gerrie are standing with their backs towards each other! 

Abracadabra with Apples

In Miss Miranda's class are eleven children. Miss Miranda has a bowl with eleven apples. Miss Miranda wants to divide the eleven apples among the children of her class, in such a way that each child in the end has an apple, but one apple still remains in the bowl.

The Question: Can you help Miss Miranda?

Solution to: Abracadabra with Apples

Ten children get a single apple, and the eleventh gets the bowl with an apple still in it.

Poor & Rich

The poor have it,
the rich want it,
but if you eat it you will die.

The Question: What is this?

Solution to: Poor & Rich

Nothing!

Twins Trouble

Julius and Vincent are brothers. "We are born within the same hour," says Julius, "on the same day of the same year." "But," says Vincent, "we are no twins!"

The Question: How is this possible?

Solution to: Twins Trouble

Julius and Vincent are part of a set of triplets, or quadruplets, or even more.

Remark: the situation that Julius and Vincent would have the same father but not the same mother, is not a valid solution, because Julius and Vincent would then be half-brothers!

Happy Birthday

When Sandra had her birthday in the year 2000 she became 8 years old. But she was born in the year 2008.

The Question: How can you explain this?

Solution to: Happy Birthday

Sandra was born in the year 2008 BC.