Quizzing Live

What Is The Only Group To Have Had Number One Hits In The 60's, 70's & 80's

Answer:
Bee Gees
Who Played The 'Coronation Street'' Character Of Leonard Swindley, Manager Of Gamma Garments?
Yvonne De Carlo And Lee Meriwether Have Both Played Which Character In The Munsters?
At Which Course Is The Derby Run Each Year?
For What Is Na The Chemical Symbol?
Which Tsar Built St Basils Cathedral?
Which Group Sat Down In The Top Ten Twice?