Clue:
Answer: Discovery. 'D' is C over Y.
Clue: GEG (9,3)
Answer: Scrambled egg. When 'egg' is scrambled we get 'geg'.
Clue: Often (7,6)
Answer: Decimal System. A decimal system is of ten.
Clue: There are only 10 kinds of people in this world (5,3,4,6,3,5,3,4)
Answer: Those who know binary and those who don't. '10' in the clue is the binary code for 2.
Clue: Joined issue (7,5)
Answer: Siamese Twins.
