How many triangles can you find in this given picture?

What is the longest word in the dictionary?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

Why is it very easy to weigh a fish?

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.

In a secret society, a buried chamber can be accessed only via a secret password. The password is seven characters long and comprises of just letters and numbers.

You find a code that can help you in cracking the password. The code says "You force heaven to be empty".

Can you deduce the password from that?

Which alphabet is a part of our body?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?