Math Challenge - Take 3

Complete the following riddles below. Use the digits in the box to answer each number in the riddle. These ones are more complicated....remember to show GRIT!!  

1         2           3              4             5           6            7            8                 9

a) I am a 4 digit number greater than 9 000. My ones digit is 3 and my hundreds digit is the smallest prime number that is greater than 5. The sum of my digits is 20. What number am I?

Remember A Prime Number can be divided evenly only by 1, or itself.

 

b) I am a 5 digit number greater than 30 000 and less than 40 000. My first and last digits are the same. The sum of thousands, hundreds, and tens digits is 15. My tens digit is 4 times as great as my hundreds digit. What number am I?

c) I am a number greater than 40 000 and less than 60 000. My ones digit and tens digit are the same. My ten thousands digit is 1 less than 3 times the sum of my ones digit and tens digit. My thousands digit is half my hundreds digit and the sum of those two digits is 9. What number am I?