How can one talk without saying a single word?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

How many triangles are there on the puzzle below?

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

Can you divide the below-given shape into four equal and identical pieces?

Replace the question mark with the correct number in below Picture:

What does this rebus puzzle means ?

What has many keys but can’t open a single lock?

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?