you need to tell us where from!
If it's England or Wales then just the same as you would use to post a letter to England.
what the price to mail letter to
Usually just one, but the price of it would depend on the size and weight of the letter, take it to a Post Office and they will tell you the cost.
3 stamps!
About one liberty stamp :)
you need ten stamps actually i don't know
3 stamps.
maybe 2 0r 3 stamps
2
The number of stamps that you need to send a letter from Australia to London, will depend with the value of one stamp.
$1.10 worth of stamps, this may change.
one
40