1) Ch. 8, v. 4: "V'zeh maa'sei ha'manorah" And this is the making of the menorah Rashi says that Moshe had difficulty in creating the menorah. Since Hashem had already shown him a vision of a fiery menorah, why couldn't he replicate it?
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." Rabbi Yisroel Salanter asks that 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?" He answers that "v'lomoh" is not "and why," but rather, it is an abbreviation, "Ulfi Medrash Hagodoh," and is a new interpretation. How can we explain this Rashi without tampering with "v'lomoh?"
3) 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, should he bring a Paschal offering on Pesach Sheini?
4) Ch. 11, v. 6: "Ein kole" There is nothing Literally these words are translated as "nothing everything." How can we explain these words in their pristine translation?
5) Ch. 12, v. 3: "V'ho'ish Moshe onov m'ode mikole ho'odom asher al pnei ho'adomoh" And the man Moshe was exceedingly humble more so than any person on the face of the earth Moshe was the greatest prophet who ever lived, and whoever would be a prophet in the future, obviously knew of his own greatness. If so, how could he be so humble?