peasy weasy - if the digit sof the two digit number are a and b, for the sake of argument, then that's a lots of ten a b lots of units. So the value of the number you get when you put a and b toegther is

10a + b

add the digits together and you get a + b

subtract that from the first one, and you get

10a + b - (a+b), or

10a - a + b - b, which equals 9a

So the answer will always be a multiple of 9 - 9, 18, 27 etc

Well I was referring to your picture age, but if you're going on real age, then with a maths A level, you shouldn't have any problem understand basic algebra like that.

## Comments

and it was my star sign too.

10a + b

add the digits together and you get a + b

subtract that from the first one, and you get

10a + b - (a+b), or

10a - a + b - b, which equals 9a

So the answer will always be a multiple of 9 - 9, 18, 27 etc

Guess what - those each have the same symbol!

Bet it wasn't your star sign tho.

eh..?

It does seem to re-organise the symbols for the various numbers so that if you have more than one go, it won't always give the same answer

Have you not heard that line - "Deck the halls with boughs of holly"?

:-D

Knew there was an easy solution :-)

where's your santa hat?

:-D

Precisely Sezz!

s'maths, innit?

you'll learn it when you go to big school, Sezz )

:-D

:-D

me as well.. I was confuzzled with the maths and the name...

Annnnnnnywaaaaaaaaay...