Four-Digit Prime Numbers by Tens (Part 1: 1000-2000)

You will be given four four-digit numbers that differ only by the last digit being 1, 3, 7, or 9. Answer which ones are prime numbers.
Example: If you are given "21, 23, 27, 29", only 23 and 29 are prime numbers, so you should choose "3, 9"
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2014MELO03
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Last updated: March 27, 2025
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First submittedMarch 27, 2025
Times taken67
Average score83.0%
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1871, 1873, 1877, 1879
1341, 1343, 1347, 1349
1861, 1863, 1867, 1869
1081, 1083, 1087, 1089
1101, 1103, 1107, 1109
1701, 1703, 1707, 1709
1351, 1353, 1357, 1359
1751, 1753, 1757, 1759
1321, 1323, 1327, 1329
1491, 1493, 1497, 1499
1301, 1303, 1307, 1309
1741, 1743, 1747, 1749
1621, 1623, 1627, 1629
1931, 1933, 1937, 1939
1221, 1223, 1227, 1229
1311, 1313, 1317, 1319
1201, 1203, 1207, 1209
1431, 1433, 1437, 1439
1661, 1663, 1667, 1669
1421, 1423, 1427, 1429
1211, 1213, 1217, 1219
1891, 1893, 1897, 1899
1551, 1553, 1557, 1559
1171, 1173, 1177, 1179
1541, 1543, 1547, 1549
1501, 1503, 1507, 1509
1021, 1023, 1027, 1029
1611, 1613, 1617, 1619
1681, 1683, 1687, 1689
1801, 1803, 1807, 1809
1481, 1483, 1487, 1489
1961, 1963, 1967, 1969
1451, 1453, 1457, 1459
1251, 1253, 1257, 1259
1011, 1013, 1017, 1019
1041, 1043, 1047, 1049
1951, 1953, 1957, 1959
1371, 1373, 1377, 1379
1191, 1193, 1197, 1199
1531, 1533, 1537, 1539
1391, 1393, 1397, 1399
1271, 1273, 1277, 1279
1181, 1183, 1187, 1189
1691, 1693, 1697, 1699
1811, 1813, 1817, 1819
1411, 1413, 1417, 1419
1061, 1063, 1067, 1069
1521, 1523, 1527, 1529
1031, 1033, 1037, 1039
1461, 1463, 1467, 1469
1991, 1993, 1997, 1999
1001, 1003, 1007, 1009
1631, 1633, 1637, 1639
1721, 1723, 1727, 1729
1771, 1773, 1777, 1779
1071, 1073, 1077, 1079
1441, 1443, 1447, 1449
1641, 1643, 1647, 1649
1941, 1943, 1947, 1949
1591, 1593, 1597, 1599
1471, 1473, 1477, 1479
1131, 1133, 1137, 1139
1601, 1603, 1607, 1609
1571, 1573, 1577, 1579
1051, 1053, 1057, 1059
1261, 1263, 1267, 1269
1761, 1763, 1767, 1769
1401, 1403, 1407, 1409
1151, 1153, 1157, 1159
1971, 1973, 1977, 1979
1581, 1583, 1587, 1589
1881, 1883, 1887, 1889
1911, 1913, 1917, 1919
1291, 1293, 1297, 1299
1821, 1823, 1827, 1829
1791, 1793, 1797, 1799
1111, 1113, 1117, 1119
1841, 1843, 1847, 1849
1281, 1283, 1287, 1289
1921, 1923, 1927, 1929
1831, 1833, 1837, 1839
1231, 1233, 1237, 1239
1561, 1563, 1567, 1569
1361, 1363, 1367, 1369
1511, 1513, 1517, 1519
1331, 1333, 1337, 1339
1091, 1093, 1097, 1099
1141, 1143, 1147, 1149
1731, 1733, 1737, 1739
1901, 1903, 1907, 1909
1981, 1983, 1987, 1989
1161, 1163, 1167, 1169
1781, 1783, 1787, 1789
1711, 1713, 1717, 1719
1381, 1383, 1387, 1389
1121, 1123, 1127, 1129
1851, 1853, 1857, 1859
1241, 1243, 1247, 1249
1671, 1673, 1677, 1679
1651, 1653, 1657, 1659
0none
11
13
17
19
21, 3
21, 7
21, 9
23, 7
23, 9
27, 9
31, 3, 7
31, 3, 9
31, 7, 9
33, 7, 9
4all
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