Determine the sum of all 3-digit positive integers which contain at least one odd digit and at least one even digit. (For purposes of the problem, zero is an even digit.)
(In reply to
solution by Ady TZIDON)
Actually, the numbers to be excluded are as follows:
111 113 115 117 119 131 133 135 137 139 151 153 155 157 159 171 173 175 177 179 191 193 195 197 199 200 202 204 206 208 220 222 224 226 228 240 242 244 246 248 260 262 264 266 268 280 282 284 286 288 311 313 315 317 319 331 333 335 337 339 351 353 355 357 359 371 373 375 377 379 391 393 395 397 399 400 402 404 406 408 420 422 424 426 428 440 442 444 446 448 460 462 464 466 468 480 482 484 486 488 511 513 515 517 519 531 533 535 537 539 551 553 555 557 559 571 573 575 577 579 591 593 595 597 599 600 602 604 606 608 620 622 624 626 628 640 642 644 646 648 660 662 664 666 668 680 682 684 686 688 711 713 715 717 719 731 733 735 737 739 751 753 755 757 759 771 773 775 777 779 791 793 795 797 799 800 802 804 806 808 820 822 824 826 828 840 842 844 846 848 860 862 864 866 868 880 882 884 886 888 911 913 915 917 919 931 933 935 937 939 951 953 955 957 959 971 973 975 977 979 991 993 995 997 999
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Posted by Charlie
on 2015-08-03 09:53:39 |
re: solution
