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

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 mules travels the same distance daily.
I noticed that two of his legs travels 10km and the remaining two travels 12km.
Obviously two mules legs cannot be a 2km ahead of the other 2.

The mules is perfectly normal. So how come this be true ?

What has a ring but no finger?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

What runs around the whole yard without moving?

The following "Brain Bat" means Slow Down.
S
L
O
W

Using the same logic, can you tell us what does the following Brain Bat means ?
E
V
I
G

A beggar on the street can make one cigarette out of every 6 cigarette butts he finds. After one whole day of searching and checking public ashtrays the beggar finds a total of 72 cigarette butts. How many cigarettes can he make and smoke from the butts he found?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?