How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

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

Prove that twice of ten is the same as twice of eleven.

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

Given that

(78)^9 = 6
And (69)^4 = 11

Can you find out

(99)^2 =?

(Note: This is Logical, not Mathematical)

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

A journalist was investigating a sacred cult in the jungles of Africa when he was caught by one of the person. He was confined in a cave till the leader arrived. The leader told him that he need to tell him a statement. If he thinks the statement is true, then the journalist head will be chopped off. If he thinks that the statement is false, his head will be smashed with a hammer.

What statement did the journalist make to survive?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

If you paint a brown house white it will become a white house. If the stoplight changes from red to green, then the light is green. So, if you throw a white shirt into the Red Sea, what will it become?