Count the number of balls in picture below:

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.

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Count the number of squares in the picture below.

That attorney is my brother, testified the accountant.

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

Who is lying?

Thirty friends were on a hiking trip when they decided to enjoy the bonfire. They assembled for it and agreed to play a game. For that, they divided themselves into five teams with seven members each, forming five rows.

How did they manage to achieve this formation?

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

What do you think with the below Picture ?