how many pages does harry potter 1 have??????????

Harry Potter and the Sorcerer's Stone (Book 1)

The answer depends on which version you're talking about:
The book was first published in the US in September 1998. That version has 309 pages:
# Reading level: Ages 9-12
# Hardcover: 309 pages
# Publisher: Scholastic; 1st American Ed edition (September 1998)
# Language: English
# ISBN-10: 0590353403
# ISBN-13: 978-0590353403
# Product Dimensions: 9.2 x 6.3 x 1.1 inches
Ref: http://www.amazon.com/Harry-Potter-Sorcerers-Stone-Book/dp/0590353403/sr=8-2/qid=1171978068/ref=pd_bbs_2/102-0120988-8266554?ie=UTF8&s=books

The British version was published in June 1997. It has 190 pages.
# Paperback: 190 pages
# Publisher: Bloomsbury Publishing PLC; Children's Ed edition (26 Jun 1997)
# Language English
# ISBN-10: 0747532745
# ISBN-13: 978-0747532743
# Product Dimensions: 5.1 x 7.8 inches
Ref: http://www.amazon.co.uk/Harry-Potter-Philosophers-Stone-Book/dp/0747532745/sr=8-1/qid=1171978253/ref=sr_1_1/203-1185485-9014322?ie=UTF8&s=books