A letter, ten rewards
مَنْ قَرَأَ حَرْفًا مِنْ كِتَابِ اللَّهِ فَلَهُ بِهِ حَسَنَةٌ، وَالْحَسَنَةُ بِعَشْرِ أَمْثَالِهَا، لَا أَقُولُ الم حَرْفٌ، وَلَكِنْ أَلِفٌ حَرْفٌ، وَلَامٌ حَرْفٌ، وَمِيمٌ حَرْفٌ
Man qara'a harfan min kitabi-llahi fa-lahu bihi hasanah, wa-l-hasanatu bi-ashri amthaliha, la aqulu Alif Lam Mim harf, wa lakin alifun harf, wa lamun harf, wa mimun harf.
"Whoever reads one letter of the Book of Allah will have a reward, and a reward is multiplied by ten. I do not say Alif Lam Mim is one letter, but Alif is a letter, Lam is a letter, and Mim is a letter."
Narrated by Abdullah ibn Mas'ud. Sunan at-Tirmidhi 2910
A short reflection
The reward is per letter, not per page. A short sitting with the Quran is hundreds of letters. The maths is the most encouraging in any book.