For the purposes of shari'a, a legal stricture in one chapter (Sura) of the Quran which is changed by a later statement in a later Sura is said to have been abrogated.
There are 114 Suras inthe Qur'an.
Those that deal with warfare and most of the governmental, political and legislative suras originated in Medina.
Alhamdulillah is mentioned at the start of 6 Quran chapters (Suras)
114
114
86 suras
13
The Quran
The word Lemaa (لما) is slang for "why". However, some suras in the Qur'an begin with random letters that have no clear meaning.
No. The Qur'an is divided into 116 Suras.
Al-Falaq & Al-Nas.
These are seven Suras.