J J Connington 
Sweepstake Murders [EPUB ebook] 

Nine men formed a sweepstake syndicate. One man died. To forestall legal argument they agreed that only living members should share any winnings. They won 241, 920. And then the deadly arithmetic began. Nine less one left eight shares worth 30, 240; Eight less one left seven shares worth 34, 560; Seven less one left six shares worth 40, 320; Six less one left five shares worth 48, 384. Who was killing for profit? And who would be left to collect?