1+"1"=11
or it needs to go the other way around, I forgot as those rules are so fricking stupid and useless.
edit for those that don't get it:
the plus sign is in javascript both used to concatenate strings and add two numbers together.
This means that 1+1 would result in 2 and that "this is a string"+" another string" would result in "this is a string another string". However if one is a string and the other is a number it has no clue what it is that you want to do and as such doesn't always end up adding the two values together resulting in 1+"1"="11".