NOTES
“几” and “多少”
While both words mean “how many” 几 assumes that the answer will be a small number (normally less than 10) and 多少 will be a large number (Normally more than 10 or not sure)
几must always be follow by a measure word while 多少 may be used without a measure word
For example
你 家 有 几 口 人? Assume a small number
你 家 有 多 少 人? Assumes a large number