There are 252 numbers between 100 and 1000 which have 7 as at least one of their digits.
Here is a list of them:
107 117 127 137 147 157 167 170
171 172 173 174 175 176 177 178
179 187 197 207 217 227 237 247
257 267 270 271 272 273 274 275
276 277 278 279 287 297 307 317
327 337 347 357 367 370 371 372
373 374 375 376 377 378 379 387
397 407 417 427 437 447 457 467
470 471 472 473 474 475 476 477
478 479 487 497 507 517 527 537
547 557 567 570 571 572 573 574
575 576 577 578 579 587 597 607
617 627 637 647 657 667 670 671
672 673 674 675 676 677 678 679
687 697 700 701 702 703 704 705
706 707 708 709 710 711 712 713
714 715 716 717 718 719 720 721
722 723 724 725 726 727 728 729
730 731 732 733 734 735 736 737
738 739 740 741 742 743 744 745
746 747 748 749 750 751 752 753
754 755 756 757 758 759 760 761
762 763 764 765 766 767 768 769
770 771 772 773 774 775 776 777
778 779 780 781 782 783 784 785
786 787 788 789 790 791 792 793
794 795 796 797 798 799 807 817
827 837 847 857 867 870 871 872
873 874 875 876 877 878 879 887
897 907 917 927 937 947 957 967
970 971 972 973 974 975 976 977
978 979 987 997
16
91.
solution: we know that there are 25 prime numbers are between 1-100 and 168 prime numbers less than 1000. 100 x 100=10000(5 digits) 999 x 999=998001(6 digits) 1000 x 1000=1000000(7 digits) so our answer should be same as the number of prime numbers between 100 to 999. hence, 168-25=143. 143 prime numbers will be there less than 1000 whose square has 5 or 6 digits.
it s 243..
There are 999 numbers between 1 and 1000, which includes all the integers from 1 to 999. If you're asking about the count of individual digits used in writing these numbers, they collectively comprise a total of 2887 digits. This is calculated by considering the number of digits in one-digit (1-9), two-digit (10-99), and three-digit numbers (100-999).
123
Not couting 1 and 1000, there would be 998 numbers.
16
252 of them.
91.
solution: we know that there are 25 prime numbers are between 1-100 and 168 prime numbers less than 1000. 100 x 100=10000(5 digits) 999 x 999=998001(6 digits) 1000 x 1000=1000000(7 digits) so our answer should be same as the number of prime numbers between 100 to 999. hence, 168-25=143. 143 prime numbers will be there less than 1000 whose square has 5 or 6 digits.
it s 243..
11000
Zero
999 are whole.
Well, sweetheart, Armstrong numbers, also known as narcissistic numbers, are numbers that are equal to the sum of their own digits raised to the power of the number of digits. In this case, the Armstrong numbers between 100 and 1000 are 153, 370, and 371. So, there you have it, darlin'. Hope that satisfies your curiosity.
Numbers above 99 and under 1000 are 3-digits, all 900 of them.