Four-Digit Prime Numbers by Tens (Part 2: 2000-3000)

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 28, 2025
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First submittedMarch 28, 2025
Times taken47
Average score86.0%
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2531, 2533, 2537, 2539
2361, 2363, 2367, 2369
2681, 2683, 2687, 2689
2651, 2653, 2657, 2659
2541, 2543, 2547, 2549
2351, 2353, 2357, 2359
2341, 2343, 2347, 2349
2171, 2173, 2177, 2179
2121, 2123, 2127, 2129
2291, 2293, 2297, 2299
2691, 2693, 2697, 2699
2471, 2473, 2477, 2479
2161, 2163, 2167, 2169
2591, 2593, 2597, 2599
2951, 2953, 2957, 2959
2581, 2583, 2587, 2589
2081, 2083, 2087, 2089
2401, 2403, 2407, 2409
2741, 2743, 2747, 2749
2251, 2253, 2257, 2259
2661, 2663, 2667, 2669
2451, 2453, 2457, 2459
2221, 2223, 2227, 2229
2481, 2483, 2487, 2489
2821, 2823, 2827, 2829
2761, 2763, 2767, 2769
2441, 2443, 2447, 2449
2201, 2203, 2207, 2209
2731, 2733, 2737, 2739
2801, 2803, 2807, 2809
2711, 2713, 2717, 2719
2391, 2393, 2397, 2399
2491, 2493, 2497, 2499
2621, 2623, 2627, 2629
2281, 2283, 2287, 2289
2921, 2923, 2927, 2929
2971, 2973, 2977, 2979
2091, 2093, 2097, 2099
2431, 2433, 2437, 2439
2311, 2313, 2317, 2319
2231, 2233, 2237, 2239
2101, 2103, 2107, 2109
2991, 2993, 2997, 2999
2881, 2883, 2887, 2889
2851, 2853, 2857, 2859
2861, 2863, 2867, 2869
2571, 2573, 2577, 2579
2001, 2003, 2007, 2009
2521, 2523, 2527, 2529
2061, 2063, 2067, 2069
2421, 2423, 2427, 2429
2791, 2793, 2797, 2799
2381, 2383, 2387, 2389
2961, 2963, 2967, 2969
2641, 2643, 2647, 2649
2141, 2143, 2147, 2149
2301, 2303, 2307, 2309
2841, 2843, 2847, 2849
2501, 2503, 2507, 2509
2811, 2813, 2817, 2819
2241, 2243, 2247, 2249
2671, 2673, 2677, 2679
2111, 2113, 2117, 2119
2031, 2033, 2037, 2039
2901, 2903, 2907, 2909
2461, 2463, 2467, 2469
2611, 2613, 2617, 2619
2891, 2893, 2897, 2899
2911, 2913, 2917, 2919
2191, 2193, 2197, 2199
2601, 2603, 2607, 2609
2211, 2213, 2217, 2219
2981, 2983, 2987, 2989
2321, 2323, 2327, 2329
2051, 2053, 2057, 2059
2551, 2553, 2557, 2559
2331, 2333, 2337, 2339
2701, 2703, 2707, 2709
2771, 2773, 2777, 2779
2151, 2153, 2157, 2159
2871, 2873, 2877, 2879
2751, 2753, 2757, 2759
2941, 2943, 2947, 2949
2011, 2013, 2017, 2019
2511, 2513, 2517, 2519
2261, 2263, 2267, 2269
2631, 2633, 2637, 2639
2831, 2833, 2837, 2839
2131, 2133, 2137, 2139
2411, 2413, 2417, 2419
2931, 2933, 2937, 2939
2041, 2043, 2047, 2049
2071, 2073, 2077, 2079
2721, 2723, 2727, 2729
2371, 2373, 2377, 2379
2271, 2273, 2277, 2279
2181, 2183, 2187, 2189
2781, 2783, 2787, 2789
2561, 2563, 2567, 2569
2021, 2023, 2027, 2029
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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