If 21x = 79x, what is the value of x?

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?

A Car is crossing a bridge 2 miles long. The bridge can only hold 10000 lbs, which is the exact weight of the car. The Car makes it half way across the bridge and stops. A bird lands on the car. Does the bridge collapse? Explain.

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?

Which digit occurred maximum times between the number 1 and 1000?

Solve the mathematical equation in the picture below.

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

Spot what is wrong here in below Picture?

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

How many triangles are there on the puzzle below?