There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains the same digits only.

Can you find that number?

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

Through your logical capabilities, can you make 7 an even?

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.

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

If six children and two dogs were under an umbrella, how come none of them got wet?

How many triangles are there in the picture below?

Which is the rope you never skip with?