Question 209076
I am a 3-digit number.
 All of my digits are odd. 
I am less than 600. 
I am greater than 400. 
If you add my digits you get 15. 
My last digit is 7. What am I?
:
All digits odd, >400, <600, first digit has to be 5
:
Last digit given as 7
:
2nd digit: 15 - 5 - 7 = 3
:
537 is the number