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

There was a blind man. He had four socks in his drawer either black or white. He opened it and took out two socks. Now the probability that it was a pair of white socks is 1/2.

Can you find out the probability that he had taken out a pair of black socks ?

How many sides does a circle have?

In which direction should the missing arrow point?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).

Jenifer and Jesica are having a conversation.

Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?

Jim has three close friends at his school: Michael, John and Alice. Two of them play football, two play basketball and two play hockey. The friend who does not play hockey does not play basketball as well. The friend who does not play football does not play hockey.

Can you identify which sport/s is played by which person?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?