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

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Which English verb becomes past tense just by rearranging the letters?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Can you count the number of squares in the given picture?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

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?

What four weights can be used to balance from 1 to 30 pounds?

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

How many triangles can you find in this given picture?