495.
495
495
The numbers 493, 495, 497, 499, 501, 503, 505, 507 are the ones you want. There are eight of them, they are consecutive odd numbers and they sum to 4000.
13% of 495= 13% * 495= 0.13 * 495= 64.35
60% of 495= 60% * 495= 0.6 * 495= 297
36% of 495= 36% * 495= 0.36 * 495= 178.2
75% of 495= 75% * 495= 0.75 * 495= 371.25
20% of 495= 20% * 495= 0.2 * 495= 99
1 x 495 = 495 3 x 165 = 495 5 x 99 = 495 9 x 55 = 495 11 x 45 = 495 15 x 33 = 495 3 x 3 x 55 = 495 3 x 3 x 5 x 11 = 495 3 x 5 x 33 = 495 5 x 9 x 11 = 495
495 + 35 % of 495 = 495 x (100+35)/100 = 495 x 135/100 = 66825/100 = 668.25
It is: 495
It is 496.496 = 24*31 so its proper factors are 2, 4, 8, 16, 31, 62, 124 and 248. Their sum is 495.