What four weights can be used to balance from 1 to 30 pounds?

A landlord calls both of his sons and tells them that their horses will now decide who will transfer the inheritance. He tells them to race along the land till the end and the one whose horse will be slower will win and be the heir to all the property.

Both of them keep wandering for days but to no result. Then they ask a wise man regarding it. The man advises them on the matter after which they jump on the horses and race as fast as they can till the end. Why did they do it?

What did the wise man say?

Move three sticks of the spiral below to form a square.

Find the next number in the following series:
6, 14, 26, 98, __?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

What word is pronounced the same if you take away four of its five letters?

Rearrange the letters in "new door" to make one word.

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

Find the next number in the series.
1 10 24 43 67 ?

What is so fragile that saying its name breaks it?