A person says 'I will be a nazirite for 10 days.' How long must he observe nazirism?
There is no nazirite vow for fewer than 30 days. A vow for any shorter period is automatically 30 days (Halachah 2).
Question 2
What is the key difference between a nazirite forever and a Samson-type nazirite?
A forever-nazirite may shave when hair becomes burdensome (every 12 months). A Samson-type nazirite may never shave at all, though he may become impure (Halachah 14).
Question 3
One witness says a person took 2 nazirite vows; another says he took 5. How many vows is he obligated to observe?
He observes 2, the minimum agreed upon by all testimony — the smaller number is fully included within the larger claim (Halachah 9).
Question 4
A person says 'I am a nazirite for 30 days and one hour.' How long must he be a nazirite?
Since there is no concept of a nazirite vow for hours, 'one hour' is treated as an additional day, making it 31 days total (Halachah 4).
Question 5
Someone says 'Behold I am a nazirite like the hairs of my head.' What is his obligation?
Such a vow creates as many 30-day nazirite terms as hairs on his head — an enormous number of consecutive vows (Halachah 18).