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?

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.

Buy me, smell me or deliver me, I do not change.

Who am I?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

What is the centre of gravity?

A solo dice game is played. In this game, upon each turn, a normal pair of dice is rolled and the score is calculated not by adding the numbers but multiplying them.

In a particular game, the score for the second roll is five more than what was achieved in the first roll. The score for the third roll is six less than what was completed in the second roll. The score for the fourth roll is eleven more than what was achieved in the third. The score for the fifth roll is eight less than what was completed in the fourth.

Can you calculate the score for each of the five throws?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Which is heavier: a ton of bricks or a ton of feathers?

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?