The Quran is divided into 30 sections called Paaras (Juz) each paara is again divided into smaller parts called Eukoo, these divisions were not made by Allah or the prophet (S.A.W).
these division did not exist in the time of the caliph too. That is why they are marked. In the margin and not inside the divine words. They were made much later, why ??
They were made so that recitation of the Quran could become easy. The prophet (S.A.W) had said, “read the Quran in one full month” he said not encourage that it be completed in less than a month.
Since a month has 30 days later the people divided it into 30 parts. So that one part could be read each day.
The Rukoo or division were also made for sake of easy reading. One rukoo holds the required portion of the Quran which we need to reside in one rqakat of prayer before each Rukoo
So find out the names of the surahs from the Quran.