what are they worth

News: Welcome to the Canadian Paper Money Forum.

please advise worth--
Bank of Montreal $10 note - issued 1931, signature Dodds Gordon (?)

Canadian Bank of Commerce $10 note, issued 1912, signature Mallory Ireland (?)

Canadian Bank of Commerce $10 note, issued 1917, signature Bird Logan (?)

Royal Bank of Canada $5 note, issued 1927, signature: Wilson Toth (?)

Imperial Bank of Canada $5 note, issued 1923, signature:  Curran Phipps (?)

Royal Bank of Canada $20 note; issued 1927, signature:  Wilson Holt (?)

impossible to say without a scan or a description of their conditions....also,don't title your post, the same as the board category.

Hello Hal and Welcome to the Forum!
Values are very much dependent upon condition.  I'll quote you book values for VG (very good) which is sort of average for notes of that vintage - well used but not abused.
Damaged notes will be worth much less, and notes in new condition will be worth a great deal more.
Expect a dealer to offer about 60 to 70% of book; a collector looking for those specific notes would pay more.
Bank of Montreal $10 1931 Dodds-Gordon $80
Canadian Bank of Commerce $10 1912 Walker-Ireland $500
Canadian Bank of Commerce $10 1917 Aird-Logan $125*
Royal Bank of Can. $5 1927 Wilson-Holt $90
Royal Bank of Can. $20 1927 Wilson-Holt $150
Imperial Bank of Can. $5 1923 Howland-Phipps $110
     same, but Rolph-Phipps, $125.  There is no Curran.
*varieties exist, the commonest is quoted.  Posting an image would help.