Which is it? ..Clue - Third prime number, after two and three (4). I've got ?i?e.
Is it Five, being the third prime number or is it Nine ,being the third prime after 2&3?
""DOH"". My wrist is well and truly slapped. My old maths teacher used to do that, 68 years ago, with her wooden foot rule..OUCH. Thanks for putting me right Elliemay 1