Hey LP,
I’ve been studying cash4ninja’s techniques about using digits 4, 5, 6, and 7. I noticed sums 12-23 hit quite a lot. I took all numbers from sums 12-23 with numbers 4, 5, 6, and 7. These numbers are singles, doubles, double-doubles, triples, and quads. Here’s the list:
Singles
Sum 12: 0147 – 0156 – 0237 – 0246 – 0345 – 1236 – 1245
Sum 13: 0148 – 0157 – 0247 – 0256 – 0346 – 1237 – 1246 – 1345
Sum 14: 0149 – 0158 – 0167 – 0248 – 0257 – 0347 – 0356 – 1247 – 1256 – 1346 – 2345
Sum 15: 0159 – 0168 – 0249 – 0258 – 0267 – 0348 – 0357 – 0456 – 1248 – 1257 – 1347 – 1356 – 2346
Sum 16: 0169 – 0178 – 0259 – 0268 – 0349 – 0358 – 0367 – 0457 – 1249 – 1258 – 1267 – 1348 – 1357 – 1456 – 2347 – 2356
Sum 17: 0179 – 0269 – 0278 – 0359 – 0368 – 0458 – 0467 – 1259 – 1268 – 1349 – 1358 – 1367 – 1457 – 2348 – 2357 – 2456
Sum 18: 0279 – 0369 – 0378 – 0459 – 0468 – 0567 – 1269 – 1278 – 1359 – 1368 – 1458 – 1467 – 2349 – 2358 – 2367 – 2457 – 3456
Sum 19: 0379 – 0469 – 0478 – 0568 – 1279 – 1369 – 1378 – 1459 – 1468 – 1567 – 2359 – 2368 – 2458 – 2467 – 3457
Sum 20: 0479 – 0569 – 0578 – 1379 – 1469 – 1478 – 1568 – 2369 – 2378 – 2459 – 2468 – 2567 – 3458 – 3467
Sum 21: 0489 – 0579 – 0678 – 1479 – 1569 – 1578 – 2379 – 2469 – 2478 – 2568 – 3459 – 3468 – 3567
Sum 22: 0589 – 0679 – 1489 – 1579 – 1678 – 2479 – 2569 – 2578 – 3469 – 3478 – 3568 – 4567
Sum 23: 0689 – 1589 – 1679 – 2489 – 2579 – 2678 – 3479 – 3569 – 3578 – 4568