1) Ch. 8, v. 2: “Da'beir el Aharon v'omarto …… b'haalos'cho" – Speak to Aharon and you shall say …… as you bring up – The Rambam in hilchos bi'as mikdosh 9:12 says that the actual lighting of the menorah lamps may be done by a non-Kohein. May a woman light the menorah?
2) Ch. 9, v. 1: “Bachodesh horishon" – In the first month – Rashi says that the first chapter in this book of Bmidbar took place chronologically earlier. This teaches us the rule of “Ein mukdam um'uchar baTorah." Rashi then asks, “V'lomoh lo posach b'zu." This seems to be a contradiction within Rashi. He just said that there need not be a chronological order, so why does he ask “Why was this parsha not said at the beginning of sefer B'midbar?"
3) Ch. 9, v. 6: “Va'y'hi anoshim" – And there were men – The change from singular to plural is problematic.
4) Ch. 9, v. 14: “V'chi yogur itchem ger v'ossoh Fesach" – If there will reside among you a convert and he will offer a Paschal sacrifice – If a person converts to Judaism after Pesach but before Pesach Sheini, shall he bring a Paschal offering?
5) Ch. 11, v. 4: “V'ho'safsuf asher b'kirbo hisavu taavoh" – And the assemblage that was within them lusted a lusting – “Asher b'kirbo" seems to be superfluous.