Can you place three balls such that the equation shown in the picture holds true?

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

What does below pictogram mean?

Consider all the numbers between 1 and 1 million. Among all these numbers, there is something very special about the number 8 and the number 2202. What is it?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

Find out the number of circles in the given picture having Illusion

It is always ahead of me yet I can never see it. What is it?

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?