Qur'an

Receiving the rewards of reciting Quraan if one cannot recite with tajweed

Q: Without knowing the recitation of Quran with tajweed, many people recite surahs that are mentioned in the hadeeth with great rewards (fazeelat) for example, surah Mulk, surah Kahf, surah Waqiah etc.Will they get the rewards as mentioned in the hadeeth or will they get sin? Secondly, should they recite these surahs mentioned in the hadeeth on regular basis.

Altering the Quraan

Q: I know that the Quran has never been changed. Did it happen in the history that someone tried to change/add words to the Quran? I know for sure if someone did it, they would fail miserably and it would be discovered because Allah protects the Quran. Just asking if someone actually attempted to change it.