Does he bring only one bull on Rosh Chodesh?
Rashi citing Menachos 45a: The Torah says that he brings two (Bamidbar 28:11); our verse teaches that if he cannot find two, he brings one.
Radak: Yes; this is a Chidush.
Why does it say "Par [ben Bakar]" (singular) "Tamim" (plural)?
Radak #1: Both the bull and its mother must be Temimim (unblemished). This is a Chidush.
Radak #2: Refer to 46:6:1:1.
Does he bring only six lambs on Rosh Chodesh?
Rashi: The Torah says that he brings seven (Bamidbar 28:11); our verse teaches that if he cannot find seven, he brings six. What is the source that if he can find only one, he brings it? "Ka'asher Tasig Yado" (7).
Radak: Yes; this is a Chidush.
What do we learn from "Yihyu"?