Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

How many sides does a circle have?

How many triangles are there on the puzzle below?

Can you identify the hidden rebus in the image below?

What Adam and Eve do not have but the rest of the people have?

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.

Why 1729 is a magic number? Answer Logically.

John was visiting his friend Jacob. He found out that his friend's wife had just killed a burglar in self-defense.
John asks Jacob about what happened and he told that "His wife was watching television when suddenly the bell rang. She thought that it is her husband Jacob but she found the burglar who attacked her instantly and she got so frightened that she killed the burglar immediately with the knife.
John asked the police to arrest his friend's wife. Why?

What word is pronounced the same if you take away four of its five letters?

Find the value of "?" in the ball picture Riddle below: