| 0† | XXRW7B56EP | definition | open | Wikipedia Glossary of set theory#AP6E |
| 1 | 5W87Q52YAS | definition | open | Wikipedia List of real analysis topics#KXSW |
| 1 | BP1226TQR9 | definition | open | Wikidata Q199, MathWorld 1, ProofWiki 1, Wikipedia 1 |
| 1 (crystal class) | W902Z175PW | unknown | open | Wikipedia Triclinic crystal system#CIEN |
| 1 (numeral) | ZWQH214S6K | unknown | open | Wikipedia 1#VAEP |
| 1 + 1 + 1 + 1 + ⋯ | 1KFXN3K6JG | definition | open | Wikipedia 1 + 1 + 1 + 1 + ⋯, Wikidata Q2555219 |
| 1 + 2 + 3 + 4 + ⋯ | CWACD9ZR82 | definition | open | Wikipedia 1 + 2 + 3 + 4 + ⋯, Wikidata Q2605420 |
| 1 + 2 + 3 + \cdots = -\frac{1}{12} | 59Y3BMSQDZ | definition | open | Wikipedia Glossary of real and complex analysis#54UD |
| 1 + 2 + 4 + 8 + ⋯ | SMCXATGW1Q | definition | open | Wikipedia 1 + 2 + 4 + 8 + ⋯, Wikidata Q151517 |
| 1 000 000 000 000 | GCK424PJ1Z | unknown | open | Wikipedia Orders of magnitude (numbers)#VILC |
| 1 000 000 000 000 000 | 6WWFJ5QZS5 | unknown | open | Wikipedia Orders of magnitude (numbers)#G6DT |
| 1 000 000 000 000 000 000 | 8BSV01F05E | unknown | open | Wikipedia Orders of magnitude (numbers)#EJFK |
| 1 000 000 000 000 000 000 000 | 8DXZAWXT9J | unknown | open | Wikipedia Orders of magnitude (numbers)#HS49 |
| 1 000 000 000 000 000 000 000 000 | JM1258NWQV | unknown | open | Wikipedia Orders of magnitude (numbers)#2Z6M |
| 1 000 000 000 000 000 000 000 000 000 | BHQ0NDCJ5Y | unknown | open | Wikipedia Orders of magnitude (numbers)#86KS |
| 1 000 000 000 000 000 000 000 000 000 000 | 7N4P5TTWH7 | unknown | open | Wikipedia Orders of magnitude (numbers)#WWQ9 |
| 1 000 000 000 000 000 000 000 000 000 000 000 | Q984RE9DNB | unknown | open | Wikipedia Orders of magnitude (numbers)#LZ93 |
| 1 000 000 000 000 000 000 000 000 000 000 000 000 | KWZ37WKWEJ | unknown | open | Wikipedia Orders of magnitude (numbers)#WO5Z |
| 1 000 000 000 000 000 000 000 000 000 000 000 000 000 | YZ9HH8BYSF | unknown | open | Wikipedia Orders of magnitude (numbers)#VLG3 |
| 1 000 000 000 000 000 000 000 000 000 000 000 000 000 000 | 49F7E526JT | unknown | open | Wikipedia Orders of magnitude (numbers)#69Z5 |
| 1 048 576 | JGHF8E71EG | unknown | open | Wikipedia Power of two#6B1J |
| 1 093 | 2RJ97P3B5Q | unknown | open | Wikipedia 1000 (number)#9NQJ |
| 1 22 polytope | 3TEEJDTS6A | object | open | Wikipedia 1 22 polytope, Wikidata Q4595914 |
| 1 289 | V8V08TQ78T | unknown | open | Wikipedia 1000 (number)#ZTKZ |
| 1 32 polytope | NWSRDEN8GJ | object | open | Wikipedia 1 32 polytope, Wikidata Q4595917 |
| 1 33 honeycomb | 91AGW2EJ6M | definition | open | Wikipedia 1 33 honeycomb, Wikidata Q4595918 |
| 1 42 polytope | A0MSQGDRV2 | object | open | Wikipedia 1 42 polytope, Wikidata Q4595919 |
| 1 458 | BP2NZ1KJKV | unknown | open | Wikipedia 1000 (number)#ZCGA |
| 1 510 | 5RGTEYM9HM | unknown | open | Wikipedia 1000 (number)#SY7B |
| 1 52 honeycomb | MMY79JQ4EC | definition | open | Wikipedia 1 52 honeycomb, Wikidata Q4595920 |
| 1 987 | Y5P413XHT7 | unknown | open | Wikipedia 1000 (number)#1FAK |
| 1 = 2 | WNYK9SG5R0 | unknown | open | Wikipedia Mathematical fallacy#P2LC |
| 1 centimeter | 83FES4XXGH | unknown | open | Wikipedia Orders of magnitude (length)#YC8J |
| 1 decameter | WTCTBZZFB2 | unknown | open | Wikipedia Orders of magnitude (length)#EC72 |
| 1 Decembrie | 11NYE22RT5 | unknown | open | Wikipedia List of places with numeric names#EIRH |
| 1 decimeter | YEVYDB6BBE | unknown | open | Wikipedia Orders of magnitude (length)#0953 |
| 1 E -10 m | 7DAMBVG7RK | unknown | open | Wikipedia Orders of magnitude (length)#ZKD7 |
| 1 E -13 m | K47YWFNJE8 | unknown | open | Wikipedia Orders of magnitude (length)#R98T |
| 1 E -16 m | XW5JSXG64E | unknown | open | Wikipedia Orders of magnitude (length)#M1G8 |
| 1 E -17 m | 2MA0V5EDQ0 | unknown | open | Wikipedia Orders of magnitude (length)#2OHD |
| 1 E -18 m | 96JMM5Q7M2 | unknown | open | Wikipedia Orders of magnitude (length)#DBYU |
| 1 E -19 m | K06T3Y374T | unknown | open | Wikipedia Orders of magnitude (length)#E712 |
| 1 E -20 m | 7MCW99NMGF | unknown | open | Wikipedia Orders of magnitude (length)#9W0X |
| 1 E -21 m | 5VMV0V3MTD | unknown | open | Wikipedia Orders of magnitude (length)#DSN0 |
| 1 E -22 m | 8FJC76JNY5 | unknown | open | Wikipedia Orders of magnitude (length)#J52Y |
| 1 E+41 m2 | 9MEDZNZCXQ | unknown | open | Wikipedia Orders of magnitude (area)#HXFF |
| 1 E-13 m | 6PQV2QS42Y | unknown | open | Wikipedia Orders of magnitude (length)#QHPD |
| 1 E-14 m | 2JQ8MTW89X | unknown | open | Wikipedia Orders of magnitude (length)#Z95Z |
| 1 E-26 m | E0DQG7K8KN | unknown | open | Wikipedia Orders of magnitude (length)#OKOI |
| 1 E-27 m | C980NHA1W5 | unknown | open | Wikipedia Orders of magnitude (length)#5SG3 |
| 1 E10 | 6P3KZG0VQC | unknown | open | Wikipedia Orders of magnitude (numbers)#4MGI |
| 1 E11 | RGSZV104R0 | unknown | open | Wikipedia Orders of magnitude (numbers)#CO3M |
| 1 E19 m² | MPBEEXETDM | unknown | open | Wikipedia Orders of magnitude (area)#GM6S |
| 1 exameter | M49FWBJTN4 | unknown | open | Wikipedia Orders of magnitude (length)#91WU |
| 1 gigameter | 1MWN65RR02 | unknown | open | Wikipedia Orders of magnitude (length)#3MX7 |
| 1 implies 2 | YCB2YD1J3V | definition | open | Wikipedia Conservative force#YCB1 |
| 1 is not a prime number | 9F8MV75E5V | unknown | open | Wikipedia Prime number#JURI |
| 1 m | GS4R401TZ3 | unknown | open | Wikipedia Orders of magnitude (length)#UWCS |
| 1 megameter | 55737H562D | unknown | open | Wikipedia Orders of magnitude (length)#ONVM |
| 1 millimeter | MRDZE41RH9 | unknown | open | Wikipedia Orders of magnitude (length)#PWYV |
| 1 nm | X1H4DF2072 | unknown | open | Wikipedia Orders of magnitude (length)#W92D |
| 1 Pm | G1T4S78E7Z | unknown | open | Wikipedia Orders of magnitude (length)#GJD0 |
| 1 terameter | K9M6MWN817 | unknown | open | Wikipedia Orders of magnitude (length)#YQ5X |
| 1 yottameter | 5NTK7KAAJN | unknown | open | Wikipedia Orders of magnitude (length)#WZT7 |
| 1 zettameter | 3859A12GFR | unknown | open | Wikipedia Orders of magnitude (length)#B3KC |
| 1 − 1 + 2 − 6 + 24 − 120 + ⋯ | VPA9Q2F81X | definition | open | Wikipedia 1 − 1 + 2 − 6 + 24 − 120 + ⋯, Wikidata Q3511165 |
| 1 − 2 + 3 − 4 + ⋯ | 92A0VCF649 | definition | open | Wikipedia 1 − 2 + 3 − 4 + ⋯, Wikidata Q438859 |
| 1 − 2 + 4 − 8 + ⋯ | DKAKCSECS0 | definition | open | Wikipedia 1 − 2 + 4 − 8 + ⋯, Wikidata Q1064181 |
| 1% rule | VTXK9YRTKZ | definition | open | Wikipedia 1% rule, Wikidata Q2273687 |
| 1,000,000 Digits of Pi | 8X7AZ9C1KK | unknown | open | Wikipedia Pi#MW4Z |
| 1,000,000,000 | 6QN3PQMJFJ | definition | open | Wikidata Q16021, MathWorld Milliard, Wikipedia 1,000,000,000 |
| 1,000,000,000,000 | DCD80GMF9Y | definition | open | Wikipedia 1,000,000,000,000, Wikidata Q862978 |
| 1,000,001 | 4PSEHZXYBG | unknown | open | Wikipedia 1,000,000#NI87 |
| 1,889,568 (number) | 242V47R4XT | unknown | open | Wikipedia 1,000,000#0CCJ |
| 1-based ruler function | PFZ6JDD77Y | object | open | Wikidata Q122695881, OEIS A001511 |
| 1-factorization conjecture | 631305H4BA | statement | open | Wikipedia Graph factorization#66AY |
| 1-factorization conjecture | RD66ZMK8WN | definition | open | Wikipedia List of unsolved problems in mathematics#12Y6 |
| 1-forest | 5CQR8MMBQW | unknown | open | Wikipedia Pseudoforest#RKZ8 |
| 1-generic | EVTWZ7564T | unknown | open | Wikipedia Generic property#HB7Z |
| 1-in-3-SAT | SFJYRSND5F | definition | open | Wikipedia 1-in-3-SAT, Wikidata Q134302204 |
| 1-norm | P9AZWCVDQZ | unknown | open | Wikidata Q2365298, MathWorld L1-Norm |
| 1-planar graph | DP6Z7FMW5S | definition | open | Wikidata Q4545823, MathWorld 1-PlanarGraph, Wikipedia 1-planar graph |
| 1-planarity | 1MSV73BJ5S | definition | open | Wikipedia List of NP-complete problems#KQTD |
| 1-Sphere | PBW9MR3QDE | unknown | open | Wikipedia Sphere#D4RF |
| 1-tuple | D5AV21N1W8 | unknown | open | Wikipedia Tuple#YI2L |
| 1-vs-2 cycles problem | 5B8TH73619 | problem | open | Wikipedia 1-vs-2 cycles problem, Wikidata Q131412142 |
| 1. Axiom of extensionality | F6XDEKVA12 | statement | open | Wikipedia Ackermann set theory#2TJA |
| 1.96 | DZ1RG7KZ1X | definition | open | Wikipedia List of statistics articles#WL3H |
| 1/ ∞ | 85FJZJPYKR | unknown | open | Wikipedia Infinitesimal#CS2S |
| 1/2 + 1/4 + 1/8 + 1/16 + ⋯ | DAS40VS9K7 | definition | open | Wikipedia 1/2 + 1/4 + 1/8 + 1/16 + ⋯, Wikidata Q3817754 |
| 1/2 − 1/4 + 1/8 − 1/16 + ⋯ | HZEDSZ1K0E | definition | open | Wikipedia 1/2 − 1/4 + 1/8 − 1/16 + ⋯, Wikidata Q3817838 |
| 1/3–2/3 conjecture | PMXZ2ZRWT0 | conjecture | open | Wikipedia List of unsolved problems in mathematics#B72A |
| 1/3–2/3 conjecture | WNX8F2J28R | conjecture | open | Wikipedia 1/3–2/3 conjecture, Wikidata Q4545863 |
| 1/4 + 1/16 + 1/64 + 1/256 + ⋯ | NXKQDMFCVB | definition | open | Wikipedia 1/4 + 1/16 + 1/64 + 1/256 + ⋯, Wikidata Q1074845 |
| 1/e-law of best choice | 7R4JSPGDSP | statement | open | Wikipedia Secretary problem#USU1 |
| 10 | 6GTX66544A | definition | open | Wikidata Q23806, MathWorld 10, ProofWiki 10, Wikipedia 10 |
| 10 nanometers | 91GG91RHZ8 | unknown | open | Wikipedia Orders of magnitude (length)#FY11 |
| 10 types of people | NSE1J0SQYK | unknown | open | Wikipedia Mathematical joke#9B73 |
| 10,000,000 | 8EQ6W13326 | definition | open | Wikidata Q115362, ProofWiki 10,000,000, Wikipedia 10,000,000 |
| 10,000,000,000 | 99RX28B5WQ | definition | open | Wikipedia 10,000,000,000, Wikidata Q4925009 |