Brain teasers

1.
What letter is next
in this sequence?
M, A, M, J, J, A, S, O,__
2.
What letter is next
in this sequence?
O, T, T, F, F, S, S, E, __
3.
What are tree mistake
in this sentence?
4.
What can run but never walks,
has a mouth but never talks,
has a head but never weeps,
and has a bed but never sleeps??
5.
What is full of holes but
still holds water?
6.
What is light as a feather,
but even the strongest man cannot hold it
more than a few minutes?
7.
A man says, "Brothers and sisters,
have I none, but that man's father
is my father's son." Who is
he pointing at?
8.
What in an automobile engine serves
no purpose but without it
the engine does not work?
9.
Imagine you are in a sinking
rowboat surrounded by sharks.
How would you survive?

10.
Johnny's mother had four children.
The first was April, the second was May,
and the third was June.
What was the name of her fourth child?

thanks guys answers in comment box
brain teasers from
http://www.azkidsnet.com/brainteasers.htm
bye!