The third clue only works if you assume ... Comment ... that the children with equal ages are twins - to eliminate 1,6,6 - but, take today (24 April 2013) and suppose the children's birthdays are: 1 Jan 2012 1 Apr 2007 1 May 2006 Ages 1,6, and 6 - but clearly an eldest to learn the piano. Reply
... that the children with equal ages are twins - to eliminate 1,6,6 - but, take today (24 April 2013) and suppose the children's birthdays are:
1 Jan 2012
1 Apr 2007
1 May 2006
Ages 1,6, and 6 - but clearly an eldest to learn the piano.