Order of characters's death and how they died

First - dies of poisoning, chokes to death

• Miss Emily Brent
• Mr. Blore
• General MacArthur
• Anthony Marston

Second - dies in her sleep

• Mrs. Rogers
• Miss Emily Brent
• Vera Claythorne

Third - hit on the back of the head with something hard

• Mr. Roger
• Justice Wargrave
• General MacArthur
• Mr. Blore

Fourth - back of head chopped with a chopper

• Dr. Armstrong
• Philip Lombard
• Mr. Rogers
• General MacArthur

Fifth - injected with a hypodermic needle of potassium cyanide

• Miss Emily Brent
• Mr. Rogers
• Mrs. Rogers
• Anthony Marston

Sixth - "shot in the head" - didn't really die

• Mr. Rogers
• Justice Wargrave
• Dr. Armstrong
• Philip Lombard

Seventh - drowned in the sea  

• Vera Claythorne
• Dr. Armstrong
• Philip Lombard
• Justice Wargrave

Eighth - head gets crushed by a marble bear clock

• Mr. Blore
• Mr. Rogers
• General MacArthur

Ninth - Vera shoots him

• Anthony Marston
• Justice Wargrave
• Philip Lombard
• Mr. Blore

Tenth - hangs herself

• Vera Claythorne
• Miss Emily Brent
• Mrs. Rogers
• Mr. Rogers