Can anyone solve this riddle?

[Chelsea Y]

Mary asked John his age and he replied, "Only one hint - reverse my age,divide by three, add 34 and my age is that."

That is the only clue.

[<lek0560>]

she still doesn't know his age to start with

[drakke1]

Only an Andromedan? )

[<lek0560>]

she still doesn't know his age to start with

[tunasalard]

mary should get a new boyfriend with a loser like john

is that it...........