Why is 6 afraid of 7?

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

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

You can see three almost identical images below. Can you spot the odd one out from them?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

How can you make number one disappear by adding something to it?

Can you count the number of quadrilaterals in the picture below?

What is the unique property of the following words ?
* Revive
* Banana
* Grammar
* Voodoo
* Assess
* Potato
* Dresser
* Uneven

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

A bus driver was heading down a street in Mexico. He went right past a stop sign without stopping, he turned left where there was a "no left turn" sign, and he went the wrong way on a one-way street. Then he went on the left side of the road past a cop car. Still - he didn't break any traffic laws. Why not?