Can you solve the photo plexer logic ?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

Bopanna was working on a murder case when he received a message about the location of the murder weapon.
The message was encrypted as below.

"deb mitciv eht edisni neddih si nopaew redrum ehT"

Tell me the location of the murder weapon.

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

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

People put me on the table and cut me but do not eat me. What am I?