85 (number)

85 (eighty-five) is the natural number following 84 and preceding 86.

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List of numbers — Integers

← 0 10 20 30 40 50 60 70 80 90 →

eighty-five

85th
(eighty-fifth)

5 × 17

1, 5, 17, 85

LXXXV

1010101₂

10011₃

1111₄

320₅

221₆

125₈

71₁₂

55₁₆

45₂₀

2D₃₆

In mathematics

85 is:

the product of two prime numbers (5 and 17), and is therefore a biprime; specifically, the 24th biprime not counting perfect squares. Together with 86 and 87, it forms the second cluster of three consecutive biprimes.
an octahedral number.^[1]
a centered triangular number.^[2]
a centered square number.^[3]
a decagonal number.^[4]
the smallest number that can be expressed as a sum of two squares, with all squares greater than 1, in two ways, 85 = 9² + 2² = 7² + 6².^[5]
the length of the hypotenuse of four pythagorean triangles.
a Smith number in decimal.^[6]

In astronomy

Messier object M85 is a magnitude 10.5 lenticular galaxy in the constellation Coma Berenices
NGC 85 is a galaxy in the constellation Andromeda
85 Io is a large main belt asteroid
85 Pegasi is a multiple star system in constellation of Pegasus
85 Ceti is a variable star in the constellation of Cetus
85P/Boethin is a periodic comet

In titles and names

Federalist No. 85, by Alexander Hamilton, the last of The Federalist Papers (1788)
The 85 Ways to Tie a Tie, a book by Thomas Fink and Yong Mao
85 Days: The Last Campaign of Robert Kennedy a book by Jules Witcover
Live/1975–85, an album of live recordings by Bruce Springsteen (1986)
80–85 a compilation album by Bad Religion (1991)
Cupid & Psyche 85, an album by band Scritti Politti (1985)
45/85 was a television documentary on World War II
Minuscule 85, Papyrus 85, Lectionary 85 are early Greek manuscripts of the New Testament
"85", a 2000 rap single by YoungBloodz, from their album Against Da Grain
85°C, a Taiwanese coffee store chain.
"The Curse Of 85 (W.S.T.F.D.W.I.T.W.W)" a 2015 rap song by Skrilla801

In sports

In U.S. college athletics, schools that are members of NCAA Division I are limited to providing athletic scholarships to a maximum of 85 football players in a given season. The specifics vary by the two Division I football subdivisions:

In the top-level FBS, each player provided with a scholarship may, and almost always does, receive a full scholarship.
In the second-level FCS, schools are allowed to provide football-related athletic aid equivalent to 63 full scholarships, but this aid may be divided among up to 85 players as the schools see fit.

In other fields

The year AD 85, 85 BC, or 1985.
The Muslim calendar year 85 AH.
The atomic number of astatine
The number of the French department Vendée
The ISBN Group Identifier for books published in Brazil
The radix of the Ascii85 (sometimes called Base85) binary-to-text encoding
The IQ and nickname of Aaron in Alien 3
The number worn by Chad Ochocinco, whose name means "eight five" in Spanish
Arabigere 85 is a village in India
E85 fuel is 85% ethanol and 15% conventional gasoline
MCS-85 was a family of Intel processors including the 8085
TI-85 was a graphing pocket calculator by Texas Instruments
KC 85 was a family of small computers built in East Germany in the 1980s
PMD 85 was a personal computer built in Czechoslovakia in 1985
Learjet 85 is an all-composite plane being developed by Bombardier Aerospace
British Rail Class 85, a category of UK train locomotives
DRG Class 85, a category of German train locomotives
TK85 was a clone of the Sinclair ZX81 made in Brazil in 1983
Lima Site 85 was a battle in the Vietnam War
A85 is the Dutch Defence in the Encyclopaedia of Chess
EF 85mm is a photographic camera lens by Canon
F85 (disambiguation), multiple uses
Part of the assignation for the Toyota AE85, commonly referred to as an "eight-five".

In military technology

85mm is a common caliber for cannons
SU-85 was a Soviet tank
TR-85 was a Romanian battle tank
Tu-85 was a prototype Soviet bomber
ASU-85 a Soviet self-propelled gun
CZ 85 is a Czech 9mm semiautomatic pistol
PT-85 is a Korean tank
7.62 Tkiv 85 is a Finnish army rifle
HG 85 is a Swiss fragmentation grenade
Taurus Model 85, a 9mm revolver made in Brazil

References

↑ "Sloane's A005900 : Octahedral numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
↑ "Sloane's A005448 : Centered triangular numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
↑ "Sloane's A001844 : Centered square numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
↑ "Sloane's A001107 : 10-gonal (or decagonal) numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
↑ "Sloane's A007692". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. . Note that the two smaller numbers on this list, 50 and 65, have 1 as one of the squares in their representations as sums of two squares.
↑ "Sloane's A006753 : Smith numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.

External links

Wikimedia Commons has media related to 85 (number).

85
Jorge Stolfi, The Hollywood Constant.

Integers

0s
0 1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29
30 31 32 33 34 35 36 37 38 39
40 41 42 43 44 45 46 47 48 49
50 51 52 53 54 55 56 57 58 59
60 61 62 63 64 65 66 67 68 69
70 71 72 73 74 75 76 77 78 79
80 81 82 83 84 85 86 87 88 89
90 91 92 93 94 95 96 97 98 99

100s
100 101 102 103 104 105 106 107 108 109
110 111 112 113 114 115 116 117 118 119
120 121 122 123 124 125 126 127 128 129
130 131 132 133 134 135 136 137 138 139
140 141 142 143 144 145 146 147 148 149
150 151 152 153 154 155 156 157 158 159
160 161 162 163 164 165 166 167 168 169
170 171 172 173 174 175 176 177 178 179
180 181 182 183 184 185 186 187 188 189
190 191 192 193 194 195 196 197 198 199

200s
200 201 202 203 204 205 206 207 208 209
210 211 212 213 214 215 216 217 218 219
220 221 222 223 224 225 226 227 228 229
230 231 232 233 234 235 236 237 238 239
240 241 242 243 244 245 246 247 248 249
250 251 252 253 254 255 256 257 258 259
260 261 262 263 264 265 266 267 268 269
270 271 272 273 274 275 276 277 278 279
280 281 282 283 284 285 286 287 288 289
290 291 292 293 294 295 296 297 298 299

300s
300 301 302 303 304 305 306 307 308 309
310 311 312 313 314 315 316 317 318 319
320 321 322 323 324 325 326 327 328 329
330 331 332 333 334 335 336 337 338 339
340 341 342 343 344 345 346 347 348 349
350 351 352 353 354 355 356 357 358 359
360 361 362 363 364 365 366 367 368 369
370 371 372 373 374 375 376 377 378 379
380 381 382 383 384 385 386 387 388 389
390 391 392 393 394 395 396 397 398 399

400s
400 401 402 403 404 405 406 407 408 409
410 411 412 413 414 415 416 417 418 419
420 421 422 423 424 425 426 427 428 429
430 431 432 433 434 435 436 437 438 439
440 441 442 443 444 445 446 447 448 449
450 451 452 453 454 455 456 457 458 459
460 461 462 463 464 465 466 467 468 469
470 471 472 473 474 475 476 477 478 479
480 481 482 483 484 485 486 487 488 489
490 491 492 493 494 495 496 497 498 499

500s
500 501 502 503 504 505 506 507 508 509
510 511 512 513 514 515 516 517 518 519
520 521 522 523 524 525 526 527 528 529
530 531 532 533 534 535 536 537 538 539
540 541 542 543 544 545 546 547 548 549
550 551 552 553 554 555 556 557 558 559
560 561 562 563 564 565 566 567 568 569
570 571 572 573 574 575 576 577 578 579
580 581 582 583 584 585 586 587 588 589
590 591 592 593 594 595 596 597 598 599

600s
600 601 602 603 604 605 606 607 608 609
610 611 612 613 614 615 616 617 618 619
620 621 622 623 624 625 626 627 628 629
630 631 632 633 634 635 636 637 638 639
640 641 642 643 644 645 646 647 648 649
650 651 652 653 654 655 656 657 658 659
660 661 662 663 664 665 666 667 668 669
670 671 672 673 674 675 676 677 678 679
680 681 682 683 684 685 686 687 688 689
690 691 692 693 694 695 696 697 698 699

700s
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

800s
800 801 802 803 804 805 806 807 808 809
810 811 812 813 814 815 816 817 818 819
820 821 822 823 824 825 826 827 828 829
830 831 832 833 834 835 836 837 838 839
840 841 842 843 844 845 846 847 848 849
850 851 852 853 854 855 856 857 858 859
860 861 862 863 864 865 866 867 868 869
870 871 872 873 874 875 876 877 878 879
880 881 882 883 884 885 886 887 888 889
890 891 892 893 894 895 896 897 898 899

900s
900 901 902 903 904 905 906 907 908 909
910 911 912 913 914 915 916 917 918 919
920 921 922 923 924 925 926 927 928 929
930 931 932 933 934 935 936 937 938 939
940 941 942 943 944 945 946 947 948 949
950 951 952 953 954 955 956 957 958 959
960 961 962 963 964 965 966 967 968 969
970 971 972 973 974 975 976 977 978 979
980 981 982 983 984 985 986 987 988 989
990 991 992 993 994 995 996 997 998 999

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