How to say "What Is Your Phone Number?" in Chinese:

Ni3 de5 hao4 ma5 shi4 duo1 shao5?

What are these numbers? 

Ni3 de5 = Your
hao4 ma5 = number
shi4 = is
duo1 shao5 = how much

Asking What's your phone number? in Chinese is done by asking "how much" (duo1 shao5) is your telephone number. It seems a little strange to ask for someone's telephone number by saying "How much is your number"... but that's how they say it in Chinese!