With the help clues provided in the image, can you find the 5 digit key?

A quarter is one-fourth of a dollar but Mr. John has changed the equation as below :

DOLLAR * 4 = QUARTER

Can you replace each letter with a digit to make the above solution correct?

What do you see in the image below

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

Count the Triangle in the figure given below:

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

Out of four images which one is the odd one out?

Which Travels Faster? Solve below famous picture riddle:

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?