Short answers, pulled from the story.
Agatha Mary Clarissa Miller entered the world on the 15th of September 1890 in Torquay, Devon. She grew up at Ashfield, a villa purchased by her parents using an inheritance from her step-grandfather.
Agatha Christie worked as an unpaid nurse and later qualified as an apothecary's assistant between October 1914 and September 1918 at the Town Hall Red Cross Hospital in Torquay. This work gave her thorough knowledge of poisons that would feature prominently in many future novels including The Mysterious Affair at Styles published in 1920.
Agatha Christie disappeared from her home in Sunningdale on the 3rd of December 1926 after quarreling with her husband over his plans to spend the weekend alone. She was discovered eleven days later on the 14th of December 1926 at the Swan Hydropathic Hotel in Harrogate registered under the name Mrs Tressa Neele.
Agatha married archaeologist Max Mallowan in Edinburgh in September 1930 when he was thirteen years younger than she. Her travels to excavation sites like Ur Nineveh Tell Arpachiyah Chagar Bazar Tell Brak and Nimrud contributed background material to several novels set in the Middle East such as Murder on the Orient Express and Death on the Nile.
The Mousetrap premiered at the Ambassadors Theatre in London's West End on the 25th of November 1952 produced by Peter Saunders and starring Richard Attenborough as Detective Sergeant Trotter. The production became the world's longest-running play reaching its 27,500th performance in September 2018 after temporarily closing due to coronavirus pandemic lockdowns.