text: 1, 4, 8, 13, 21, 31, 41, 50, 55, 65, 75  ..... what is the next number , if possible please give the reason?   [1] +20 = [21] +34 = [55] [4] +27 = [31] +34 = [65] [8] +33 = [41] +34 = [75] [13] +37 = [50] +34 = [84]  20, 27, 33, and 37 are probably bogus numbers or a half-cooked code you inserted, while the pattern occurs with the 34's added at intervals.  answer: 84. that's what my genius siblings say.