| Name the Virus | 0 | - | 4.87 | 77,210 |
| Medical Conditions Quiz | 0 | - | 4.78 | 125,019 |
| International Scientific Units | 0 | - | 4.95 | 158,638 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 63,415 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 39,017 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,265,082 |
| Medical Vocabulary | 0 | - | 4.54 | 59,574 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,564 |
| Elements by Symbol | 0 | - | 4.92 | 199,162 |
| Speed Symbol by Element | 0 | - | 4.90 | 105,799 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 94,934 |
| Noble Gases | 0 | - | 4.89 | 79,009 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 65,207 |
| Periodic Table Symbols | 0 | - | 4.97 | 81,322 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 82,587 |
| Diseases and Medical Conditions A-Z | 0 | - | 4.70 | 58,332 |
| Medical Specialties | 0 | - | 4.33 | 92,386 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 81,327 |
| Famous Scientists | 0 | - | 4.58 | 42,891 |
| Things Named For People #3 - Science | 0 | - | 4.86 | 54,360 |
| Elemental Words | 0 | - | 4.97 | 52,624 |
| Metals of Antiquity | 0 | - | 4.95 | 94,061 |
| The Diseases They Had | 0 | - | 4.15 | 14,084 |
| Elements - Sudden Death | 0 | - | 4.92 | 136,979 |
| Animals - Taxonomy to Common Name | 0 | - | 4.81 | 28,558 |
| Random Symbol to Element | 0 | - | 4.88 | 94,267 |
| Astronomy Quiz | 0 | - | 4.90 | 83,478 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 138,847 |
| Solar System Trivia | 0 | - | 4.93 | 47,319 |
| Dumb it Down Doc | 0 | - | 4.13 | 65,222 |
| Click the Planet | 0 | - | 4.96 | 92,457 |
| Capital Cities - Sudden Death | 0 | - | 4.99 | 286,883 |
| Countries With 100 Million People - Sudden Death | 0 | - | 4.97 | 200,264 |
| Countries With a Population Under 1 Million - Sudden Death | 0 | - | 4.93 | 87,380 |
| Scientific Names | 0 | - | 4.32 | 78,775 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 87,101 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 32,120 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 189,986 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,896 |
| Body Part Cliches | 0 | - | 4.44 | 123,716 |
| Bones of the Human Body | 0 | - | 4.51 | 43,806 |
| Famous Effects | 0 | - | 4.59 | 12,901 |
| Click the Chemical Element | 0 | - | 4.96 | 81,631 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,104,156 |
| NATO Members - Sudden Death | 0 | - | 4.95 | 155,579 |
| Eliminate European Cities - Sudden Death | 0 | - | 4.96 | 100,066 |
| Two Color Flags - Sudden Death | 0 | - | 4.96 | 105,598 |
| Countries With High Population Density - Sudden Death | 0 | - | 4.92 | 38,906 |
| Name a Valid Answer - Science | 0 | - | 4.79 | 41,554 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,485 |
| A Quiz About Diamonds | 0 | - | 4.60 | 11,702 |
| Periodic Table Elements by Clue #2 | 0 | - | 4.46 | 12,363 |
| Science General Knowledge #1 | 0 | - | 4.54 | 167,664 |
| Science General Knowledge #2 | 0 | - | 4.48 | 119,851 |
| Science General Knowledge #3 | 0 | - | 4.56 | 109,788 |
| Science Vocabulary #2 | 0 | - | 4.52 | 60,042 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,170 |
| Word Chain - Science | 0 | - | 4.59 | 55,225 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,806 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,890 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 152,624 |
| Name the Constellations - With a Map | 0 | - | 4.91 | 36,282 |
| The Sun Quiz | 0 | - | 4.93 | 35,233 |
| Environmental Issues | 0 | - | 4.54 | 26,928 |
| First Names of Scientists | 0 | - | 4.51 | 57,303 |
| Groups of Two - Science | 0 | - | 4.26 | 48,498 |
| Science Vocabulary #1 | 0 | - | 4.34 | 72,277 |
| Science Vocabulary #3 | 0 | - | 4.31 | 52,284 |
| Science Decoder | 0 | - | 4.52 | 28,879 |
| Science True or False | 0 | - | 4.35 | 40,595 |
| Answers are Elements #2 | 0 | - | 4.43 | 55,249 |
| Elements by Picture | 0 | - | 4.27 | 70,423 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 103,647 |
| Name a Valid Element | 0 | - | 4.68 | 70,508 |
| Medical Acronyms | 0 | - | 4.43 | 97,351 |
| Spielberg Movie Images - Sudden Death | 0 | - | 4.47 | 55,173 |
| Birds - Sudden Death | 0 | - | 4.54 | 68,857 |
| Tom Hanks Movies - Sudden Death | 0 | - | 4.57 | 64,776 |
| Most Populated Countries - Sudden Death | 0 | - | 4.69 | 80,248 |
| NBA Champion Players - Sudden Death | 0 | - | 4.56 | 133,348 |
| FIFA World Cup Host Countries - Sudden Death | 0 | - | 4.47 | 63,143 |
| Birthstones by Month | 0 | - | 4.44 | 88,277 |
| "Ologies" Quiz | 0 | - | 4.34 | 97,669 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,487 |
| Name the Metal Alloy | 0 | - | 4.73 | 14,149 |
| Answers are Elements #1 | 0 | - | 4.29 | 53,020 |
| Most Guessed Elements on JetPunk | 0 | - | 4.56 | 48,349 |
| Element... or Pokémon? | 0 | - | 4.98 | 133,291 |
| Brightest Natural Objects in the Sky | 0 | - | 4.46 | 28,716 |
| Planets By Picture Quiz | 0 | - | 4.49 | 57,529 |
| Body Part Words | 0 | - | 4.43 | 146,509 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,985 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 177,233 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,985 |
| Human Body A-Z | 0 | - | 4.51 | 130,195 |
| One-Syllable Human Body Parts | 0 | - | 4.30 | 88,622 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 120,178 |
| Super Bowl Winners - Sudden Death | 0 | - | 4.53 | 39,727 |
| Red, White, & Blue Flags - Sudden Death | 0 | - | 4.67 | 193,427 |
| NBA MVPs - Sudden Death | 0 | - | 4.52 | 125,408 |
| Christmas Songs - Sudden Death | 0 | - | 4.21 | 51,497 |
| Books of the Bible - Sudden Death | 0 | - | 4.43 | 58,876 |
| The Pluto Quiz | 0 | - | 4.61 | 9,950 |
| Citrus Fruits | 0 | - | 3.67 | 42,225 |
| Fish... or Not a Fish? | 0 | - | 4.39 | 43,834 |
| Periodic Table Elements Mentioned in the Bible | 0 | - | 4.77 | 71,038 |
| Category Elimination - Elements | 0 | - | 4.61 | 54,232 |
| Astronomy Decoder | 0 | - | 4.48 | 38,277 |
| The Jupiter Quiz | 0 | - | 4.64 | 16,550 |
| The Mars Quiz | 0 | - | 4.55 | 18,750 |
| The Saturn Quiz | 0 | - | 4.54 | 11,603 |
| Planets - Multiple Choice | 0 | - | 4.39 | 53,916 |
| Most Common Body Part Words | 0 | - | 3.90 | 31,855 |
| 16 Questions that Prove that Physics Makes No Sense | 0 | - | 4.18 | 21,018 |
| Modern Rappers - Sudden Death | 0 | - | 4.32 | 124,669 |
| Star Spangled Banner - Sudden Death | 0 | - | 4.17 | 34,652 |
| Countries With Low Population Density - Sudden Death | 0 | - | 4.67 | 23,019 |
| The Venus Quiz | 0 | - | 4.21 | 6,976 |
| Signs of the Zodiac Quiz | 0 | - | 4.46 | 228,167 |
| Name the Constellations | 0 | - | 4.63 | 48,518 |
| Astronomy True or False | 0 | - | 4.39 | 36,645 |
| Songs with Body Parts in the Title | 0 | - | 4.32 | 216,615 |
| Body Parts - No Vowels | 0 | - | 4.13 | 25,628 |
| U.S. States with Glaciers | 0 | - | 4.61 | 25,589 |
| Largest Countries Without Glaciers | 0 | - | 4.92 | 35,766 |
| Elements Named for Countries | 0 | - | 4.52 | 25,058 |
| Recommended Childhood Vaccines for Americans | 0 | - | 4.42 | 14,784 |
| Animals by Skeleton Image | 0 | - | 4.81 | 47,087 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,627 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,561 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,650 |
| U.S. States with the Most Drug Overdose Deaths | 0 | - | 4.10 | 27,041 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 110,062 |
| Countries by Carbon Dioxide Emissions per Capita | 0 | - | 4.03 | 49,213 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 65,075 |
| Countries with the Most Mangroves | 0 | - | 4.54 | 34,769 |
| Top 10 Solar Power Countries | 0 | - | 4.78 | 60,242 |
| Top 10 U.S. States by Solar Power | 0 | - | 4.25 | 25,944 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,970 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,976 |
| Countries with the Most Forest | 0 | - | 4.88 | 148,334 |
| Top 10 Most-Forested U.S. States | 0 | - | 4.37 | 45,803 |
| Least-Forested Countries | 0 | - | 4.53 | 65,485 |
| Top 10 Most Forested Countries in Asia | 0 | - | 4.63 | 63,715 |
| Countries with the Most Forest A-Z | 0 | - | 4.63 | 55,798 |
| Most Forested European Countries | 0 | - | 4.80 | 75,772 |
| Least Forested European Countries | 0 | - | 4.25 | 54,243 |
| Least Forested Countries in Asia | 0 | - | 4.75 | 65,001 |
| Countries with the Highest Percentage of Forest | 0 | - | 4.63 | 37,986 |
| Top 10 Least-Forested U.S. States | 0 | - | 4.50 | 46,717 |
| Tropical Rainforest Countries | 0 | - | 4.69 | 82,421 |
| Countries with Tropical Rainforest and Glaciers | 0 | - | 4.51 | 55,831 |
| Countries with Glaciers | 0 | - | 4.97 | 105,926 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,205 |
| Every European Flag - Sudden Death | 0 | - | 4.96 | 400,982 |
| Olympic Host Countries - Sudden Death | 0 | - | 4.91 | 122,114 |
| Every American Flag - Sudden Death | 0 | - | 4.89 | 71,677 |
| Every African Flag - Sudden Death | 0 | - | 4.97 | 79,644 |
| True or False - Sudden Death | 0 | - | 4.91 | 158,691 |
| Smallest 25 U.S. States - Sudden Death | 0 | - | 4.54 | 148,407 |
| Arrow Puzzle #1 - Sudden Death | 0 | - | 4.78 | 111,200 |
| U.S. Presidents - Sudden Death | 0 | - | 4.81 | 181,771 |
| Memory Test - Sudden Death | 0 | - | 4.92 | 354,397 |
| Summer Olympics Host Cities - Sudden Death | 0 | - | 4.96 | 46,047 |
| Star Wars Picture Chain - Sudden Death | 0 | - | 4.51 | 107,445 |
| Michael Jackson Songs - Sudden Death | 0 | - | 4.66 | 97,795 |
| Real People - Sudden Death #1 | 0 | - | 4.15 | 108,208 |
| 13 American Colonies - Sudden Death | 0 | - | 4.90 | 48,528 |
| British Bands - Sudden Death | 0 | - | 4.60 | 96,660 |
| Prime Numbers - Sudden Death | 0 | - | 4.62 | 100,395 |
| European Capitals - Sudden Death | 0 | - | 4.94 | 222,202 |
| Queen Songs - Sudden Death | 0 | - | 4.82 | 56,177 |
| ABBA Songs - Sudden Death | 0 | - | 4.61 | 46,982 |
| "C" Countries - World Map Sudden Death | 0 | - | 4.81 | 204,471 |
| Megacities - World Map Sudden Death | 0 | - | 4.92 | 159,523 |
| French People - Sudden Death | 0 | - | 4.67 | 29,341 |
| Martin Scorsese Movies - Sudden Death | 0 | - | 4.55 | 17,374 |
| Countries that Use the Euro - Sudden Death | 0 | - | 4.93 | 257,188 |
| Blue States - Sudden Death | 0 | - | 4.97 | 89,946 |
| U.S. State Capitals - Sudden Death | 0 | - | 4.80 | 132,673 |
| China's Neighbours - Sudden Death | 0 | - | 4.70 | 151,899 |
| Shakespeare Plays - Sudden Death | 0 | - | 4.86 | 60,695 |
| Be Sad - Sudden Death | 0 | - | 4.74 | 77,634 |
| American Singers – Sudden Death | 0 | - | 4.51 | 83,236 |
| NATO Phonetic Alphabet - Sudden Death | 0 | - | 4.93 | 140,002 |
| American Bands - Sudden Death | 0 | - | 4.51 | 72,517 |
| Musical Movies - Sudden Death | 0 | - | 3.95 | 70,799 |
| Be Happy - Sudden Death | 0 | - | 4.90 | 120,907 |
| Indo-European Languages - Sudden Death | 0 | - | 4.78 | 38,015 |
| Countries With Same-Sex Marriage – Sudden Death | 0 | - | 4.26 | 72,354 |
| Muslim Countries - Sudden Death | 0 | - | 4.93 | 157,820 |
| K-Pop Groups - Sudden Death | 0 | - | 4.21 | 46,559 |
| North American Pro Sports Teams – Sudden Death | 0 | - | 4.56 | 54,933 |
| NBA Cities - Sudden Death | 0 | - | 4.74 | 70,042 |
| Imperial Japan or Die! - Sudden Death | 0 | - | 4.65 | 48,012 |
| Marvel Superheroes - Sudden Death | 0 | - | 4.90 | 121,652 |
| 2000s Movies - Sudden Death | 0 | - | 4.49 | 25,449 |
| Landlocked Countries - Sudden Death | 0 | - | 4.97 | 170,986 |
| British Cities - Sudden Death | 0 | - | 4.74 | 99,904 |
| Equatorial Countries - Sudden Death | 0 | - | 4.78 | 60,181 |
