All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad, sallallaahu 'alayhi wa sallam, is His slave and Messenger.
Only Allah, The Exalted, knows the exact number of the levels of Paradise; Al-Qurtubi said in Al-Mufhim: “It should not be assumed from this that the number of the levels of Paradise is limited to this number; rather, there are more than that, and only Allah, The Almighty, knows their exact number. Do you not see that he said in the other Hadeeth: ‘It shall be said to the one who memorized the Quran: “Recite and ascend, for, indeed, your rank shall be at the last verse you recite.’” This indicates that there are levels in Paradise equal to the number of verses in the Quran, which is over six-thousand verses. So, if a person combines the virtue of Jihaad and that of memorizing the Quran, he earns all those levels. As such, the more good deeds he performs, the more levels he attains.” [End of Quote]
Imam Ibn Al-Qayyim allocated a chapter in his book Haadi Al-Arwaah to the levels of Paradise and stated that the Hadeeth that reads: ‘It shall be said to the one who memorized the Quran: ‘Recite and ascend…’ indicates that the levels of Paradise are more than one hundred. As for the hundred levels mentioned in the Hadeeth that reads: ‘There are one-hundred levels in Paradise which Allah has prepared for those who carry on Jihaad in His Cause,’ these one hundred levels are either included in the total number of levels in Paradise or they are the highest one hundred levels therein. The chapter extensively discussed this topic, so you may refer to it if you wish. Shaykh Al-Ghunaymaan said in his book Sharh Kitaab At-Tawheed min Saheeh Al-Bukhari:
These levels are exclusively allocated to those who carry out Jihaad in the cause of Allah. This does not negate that there are other levels in Paradise allocated to other than those who carry out Jihaad. For instance, the Prophet said: “It shall be said to the one who memorized the Quran: Recite and ascend; and recite with Tarteel [harmonious measured recitation] as you used to recite in the worldly life; for, indeed, your rank shall be at the last verse you recite.” [Abu Daawood, At-Tirmithi: Saheeh (authentic)] The total number of verses in the Quran is six thousand two hundred and thirty-six, noting that scholars held different opinions in this regard. [End of Quote]
Allah knows best.