Номер 358

290 + 10 = 300;
300 + 60 = 360;
360 + 7 = 367;
380 + 20 = 400;
400 + 40 = 440;
440 + 6 = 446;
470 + 30 = 500;
500 + 50 = 550;
550 + 9 = 559.