As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

What do you see in the image below

I have eight fingers and two thumbs but I do not live. What Am I?

During an experiment, a guy throws a bouncy ball from a 100 feet tall building. The ball has a specific characteristic. Every time it hits the ground, it bounces up halfway.

How many bounces do you think the ball will make before it comes to a stop ?

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.

If,

20 % 5 = 24

21 % 7 = 33

42 % 6 = 67

Then;

66 % 6 = ?

A bomb exploded in a room full of married couples and no one died. How?