521 years ago.
3x117=513 or 513/3=117 or 513/117=3
Yes, 513 is composite. The factors of 513 are: 1, 3, 9, 19, 27, 57, 171, 513.
6z-513 = -507
9*57=513
513 = 201
513 is not prime. 513 = 3 * 3 * 3 * 19
513, as a fraction, is 513/1 or 1026/2 etc.
513/2= 256.5
512.715 becomes 513
513/1000000000 is in its simplest form.
85.5