5. Подчеркните простые числа. 21, 57, 13, 25; 9, 12, 15, 29; 45, 53, 100, 65; 31, 96, 57, 63; 37, 69, 93, 81. 15, 23, 21, 33; 21, 25, 57, 83; 17, 24, 45, 63; 18, 59, 51, 81; 42, 35, 97, 39. 205, 233, 411, 513; 309, 303, 315, 359; 507, 573, 587, 591; 632, 631, 675, 693; 809, 813, 862, 873.