а) 7: {42, 49, 56, 63}
б) 3: {33, 36, 39, 42, 45, 48, 51, 54, 57, 60, 63}
в) 9: {36, 45, 54, 63}
г) 5: {35, 40, 45, 50, 55, 60}
д) 2: {32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64}