31.4194
31
0
7.75
Oh, dude, you're hitting me with the math questions? Okay, so if you want to know what number added to 13 equals 31, it's 18. I mean, you could've just asked me for the answer straight up, but hey, I'm here to help with your math mysteries.
13.7097
24
31
403 is composite. It can be evenly divided by 13: 403/13 = 31.
2.5833
13
2