What number is missing from this series?5 7 12 19 31 ( )

What is you number what is< > telephone number What is my number?( ) number is 8. What is your phone number What number is this bus? what is his telephone number ? What is your photo number? What is ann your telephone number What is your room number 怎么回答 what is his phone number?回答句 what is your account number please what is your telepfone number? 什么意思 7.5% of what number is 12? 12 is 24% of what number? 16 is 64% of what number? 96 is 0.03% of what number? What is fire number in China? What is the emergency number in Americae