由1705这四个数共可,组成多少个数字重复的四位数?答:由1705这四个数共可组成的四位数有:1117, 1151, 1171, 1175, 1511, 1551, 1571, 1575, 1711, 1751, 1771, 1775, 5111, 5151, 5171, 5175, 5511, 5551, 5571, 5575, 5711, 5751, 5771, 5775, 7111, 7151, 7171, 7175, 7511, 7551, 7571, 7575, 7711, 7751, 7771, 7775.共有36...
数字1163是不是质数答:是质数,另外1000-2000之间的质数表:1009,1013,1019,1021,1031,1033,1039,1049,1051,1061,1063,1069,1087,1091,1093,1097,1103,1109,1117,1123,1129,1151,1153,1163,1171,1181,1187,1193,1201,1213,1217,1223,1229,1231,1237,1249,1259,1277,1279,1283,1289,1291,1297,1301,1303,1307,1319,1321...