| Random Symbol to Element | 0 | - | 4.88 | 92,728 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,841 |
| International Scientific Units | 0 | - | 4.95 | 156,340 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,581 |
| Cold War Decoder | 0 | - | 4.83 | 52,210 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,095,147 |
| Science General Knowledge #1 | 0 | - | 4.54 | 164,905 |
| Science General Knowledge #2 | 0 | - | 4.48 | 117,896 |
| Science General Knowledge #3 | 0 | - | 4.55 | 104,902 |
| Word Chain - Science | 0 | - | 4.59 | 54,737 |
| Geography Decoder | 0 | - | 4.53 | 75,531 |
| Continental Geography Decoder | 0 | - | 4.46 | 52,549 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,235,271 |
| The Sun Quiz | 0 | - | 4.93 | 34,440 |
| First Names of Scientists | 0 | - | 4.50 | 56,712 |
| Groups of Two - Science | 0 | - | 4.26 | 48,256 |
| Elements by Symbol | 0 | - | 4.92 | 196,661 |
| Speed Symbol by Element | 0 | - | 4.91 | 104,366 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,949 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,846 |
| Noble Gases | 0 | - | 4.89 | 77,928 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 64,397 |
| Periodic Table Symbols | 0 | - | 4.97 | 71,791 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 81,399 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 102,673 |
| Name a Valid Element | 0 | - | 4.64 | 69,893 |
| Name the Virus | 0 | - | 4.87 | 76,612 |
| Christmas Decoder | 0 | - | 4.42 | 49,447 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 80,322 |
| Famous Scientists | 0 | - | 4.57 | 42,578 |
| Citrus Fruits | 0 | - | 3.63 | 42,027 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,856 |
| Answers are Elements #1 | 0 | - | 4.29 | 52,781 |
| Elemental Words | 0 | - | 4.96 | 52,187 |
| Metals of Antiquity | 0 | - | 4.94 | 93,248 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 176,161 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,484 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 88,013 |
| Analogies of Countries #1 | 0 | - | 4.88 | 68,313 |
| Best-Selling Video Game Consoles | 0 | - | 4.82 | 273,012 |
| Halloween Decoder | 0 | - | 4.21 | 45,591 |
| Name a Valid Answer - Geography | 0 | - | 4.95 | 104,061 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,530 |
| Astronomy Decoder | 0 | - | 4.50 | 37,972 |
| Scientific Names | 0 | - | 4.32 | 78,351 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,610,997 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,362 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,964 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 188,159 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,412 |
| Astronomy Quiz | 0 | - | 4.90 | 82,294 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 136,722 |
| Solar System Trivia | 0 | - | 4.93 | 46,427 |
| Body Part Cliches | 0 | - | 4.43 | 123,232 |
| Bones of the Human Body | 0 | - | 4.52 | 41,944 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,987 |
| Italian Name Translation | 0 | - | 4.81 | 46,252 |
| Songs that Start with the Same Word | 0 | - | 4.87 | 110,479 |
| Word Scramble - Countries | 0 | - | 4.86 | 2,096,746 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 164,852 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 117,563 |
| Anagram Chain - Countries | 0 | - | 4.98 | 116,055 |
| 7 Deadly Sins | 0 | - | 4.88 | 398,656 |
| Geography Quiz for Dummies | 0 | - | 4.87 | 108,387 |
| Disney Animated Characters | 0 | - | 4.88 | 600,779 |
| Conspiracy Theories – Mostly U.S. | 0 | - | 4.44 | 56,431 |
| Geographic Groups of Two #1 | 0 | - | 4.99 | 236,573 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 448,622 |
| Countries with Four Letters | 0 | - | 4.99 | 421,178 |
| 4-Letter Geography Chain #1 | 0 | - | 4.81 | 169,775 |
| Animal Decoder | 0 | - | 4.06 | 15,505 |
| Eight Most Popular Berries | 0 | - | 4.43 | 99,146 |
| Top 20 Fruits Sold in the U.S. | 0 | - | 4.44 | 67,529 |
| Name a Valid World City | 0 | - | 4.83 | 70,834 |
| Countries but all Vowels are Changed to O | 0 | - | 4.93 | 69,008 |
| Solve the Secret Country #3 | 0 | - | 4.98 | 64,110 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,105 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 215,464 |
| Fruits: No Vowels | 0 | - | 4.81 | 99,272 |
| Countries of the World with an Empty Map - Hard Version | 0 | - | 5.00 | 304,309 |
| Islands by Country #1 | 0 | - | 4.88 | 174,998 |
| Regions of Countries #1 | 0 | - | 4.96 | 159,291 |
| Regions of Countries #2 | 0 | - | 4.95 | 123,638 |
| Regions of Countries #3 | 0 | - | 4.85 | 90,580 |
| Random Geographic Groups of Five | 0 | - | 4.93 | 114,268 |
| Top Five Countries By Category #2 | 0 | - | 4.93 | 199,318 |
| Top Five Countries By Category #3 | 0 | - | 4.81 | 170,548 |
| Country Chain | 0 | - | 4.96 | 216,686 |
| Can You Name These 50 Random Countries? | 0 | - | 4.98 | 215,631 |
| Name a Valid Year in History | 0 | - | 4.93 | 66,941 |
| Name a Valid First-Level Subdivision for Every Country | 0 | - | 4.97 | 49,891 |
| Name a Valid Country #3 | 0 | - | 4.99 | 262,254 |
| Name a Valid Country #1 | 0 | - | 4.99 | 288,097 |
| Name a Valid Country #2 | 0 | - | 4.98 | 249,734 |
| Name a Valid Country #4 | 0 | - | 4.97 | 254,675 |
| Name a Valid Country #5 | 0 | - | 4.99 | 205,995 |
| Name a Valid Country #6 | 0 | - | 4.94 | 128,747 |
| Name a Valid Country #7 | 0 | - | 4.91 | 128,652 |
| Name a Valid Country #8 | 0 | - | 4.85 | 98,008 |
| Random Name a Valid Bordering Country | 0 | - | 4.99 | 75,137 |
| Name a Valid Country #10 | 0 | - | 4.93 | 42,501 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,347 |
| Random Geographic Groups of Seven | 0 | - | 4.91 | 45,765 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,233 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,486 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,610 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,474 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,529 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 151,295 |
| Environmental Issues | 0 | - | 4.54 | 26,800 |
| Countries by Languages in 90 Seconds | 0 | - | 4.93 | 718,118 |
| Chuck Norris Facts | 0 | - | 4.51 | 8,324 |
| Two Letter Answers #2 | 0 | - | 4.43 | 86,275 |
| One Letter Answers #1 | 0 | - | 4.47 | 77,478 |
| Guess a Top 5 Last Name by Country | 0 | - | 4.63 | 45,515 |
| "Son" Last Names | 0 | - | 4.47 | 42,048 |
| Shared First Names #2 | 0 | - | 4.53 | 45,221 |
| People with J Initials | 0 | - | 4.51 | 55,376 |
| History Analogies #1 | 0 | - | 4.53 | 89,898 |
| History Analogies #2 | 0 | - | 4.49 | 77,143 |
| History Analogies #3 | 0 | - | 4.61 | 80,582 |
| English Idioms #1 | 0 | - | 4.45 | 145,255 |
| Cliche Quotes Quiz #2 | 0 | - | 4.43 | 45,355 |
| Clothing Idioms | 0 | - | 4.41 | 34,156 |
| Are You a Nerd? | 0 | - | 4.35 | 44,755 |
| The Eleven Colors | 0 | - | 4.73 | 234,797 |
| Groups of Things - History #1 | 0 | - | 4.41 | 93,957 |
| King in the Answers | 0 | - | 4.42 | 49,917 |
| Super in the Answers | 0 | - | 4.52 | 109,805 |
| Four Letter Geography #1 | 0 | - | 4.69 | 89,278 |
| Five Letter Geography #3 | 0 | - | 4.61 | 131,137 |
| Six Letter Geography #1 | 0 | - | 4.42 | 114,526 |
| Six Letter Geography #2 | 0 | - | 4.68 | 67,558 |
| Six Letter Geography #3 | 0 | - | 4.52 | 81,637 |
| Seven Letter Geography #1 | 0 | - | 4.52 | 72,361 |
| Seven Letter Geography #3 | 0 | - | 4.50 | 37,960 |
| Eight Letter Geography #1 | 0 | - | 4.45 | 38,514 |
| Five Letter Geography #1 | 0 | - | 4.48 | 151,419 |
| Five Letter Geography #4 | 0 | - | 4.78 | 84,799 |
| Five Letter Geography - Hero Mode | 0 | - | 4.63 | 35,518 |
| Random History by Country | 0 | - | 4.53 | 34,788 |
| Letter A Geography Chain | 0 | - | 4.54 | 67,490 |
| 6-Letter Movie Chain #3 | 0 | - | 4.43 | 36,221 |
| Fruit & Vegetable Varieties Quiz | 0 | - | 4.30 | 58,335 |
| Fruits by Picture | 0 | - | 4.19 | 806,396 |
| Plants as Key Ingredient | 0 | - | 4.40 | 46,357 |
| Answers are Beverages | 0 | - | 4.10 | 61,280 |
| Basic Cake Ingredients | 0 | - | 4.23 | 110,389 |
| Types of Food | 0 | - | 4.25 | 89,514 |
| The Foods they Ate | 0 | - | 4.03 | 69,388 |
| Animals Used in Food | 0 | - | 4.28 | 77,975 |
| Most Popular Fruits | 0 | - | 4.16 | 96,507 |
| Healthiest Fruits and Vegetables | 0 | - | 4.02 | 46,739 |
| 10 Most Popular Pizza Toppings | 0 | - | 4.06 | 85,076 |
| Valid Answer - World History #1 | 0 | - | 4.56 | 61,778 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 319,415 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,846 |
| Movie Title Antonyms #1 | 0 | - | 4.81 | 195,254 |
| Obfuscations of Movie Titles #1 | 0 | - | 4.93 | 61,926 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.42 | 321,155 |
| Five Biggest Immigrant Groups by Country #1 | 0 | - | 4.97 | 180,452 |
| Five Biggest Immigrant Groups by Country #2 | 0 | - | 4.91 | 88,865 |
| Top Five Countries By Fruit Production | 0 | - | 4.96 | 78,682 |
| The Only Country ... | 0 | - | 4.91 | 80,663 |
| 20 Random Countries on an Empty World Map | 0 | - | 4.98 | 123,654 |
| Random Countries by Borders | 0 | - | 4.99 | 82,198 |
| Top Five Countries by Random Categories | 0 | - | 4.95 | 138,718 |
| Random Name a Valid Country | 0 | - | 4.99 | 204,480 |
| Random Point on Land to Country | 0 | - | 4.99 | 233,493 |
| Random Countries on a Topological Map | 0 | - | 4.91 | 51,759 |
| Valentine's Day Decoder | 0 | - | 3.92 | 15,858 |
| Canada Decoder | 0 | - | 4.12 | 18,699 |
| World Countries by 10 Category Elimination #1 | 0 | - | 4.97 | 122,403 |
| Category Elimination - Countries #2 | 0 | - | 4.98 | 235,205 |
| Category Elimination - Countries #3 | 0 | - | 4.99 | 224,268 |
| Category Elimination - Countries #4 | 0 | - | 4.99 | 191,570 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,589 |
| Name a Valid Island Country | 0 | - | 4.96 | 114,664 |
| Country Quiz on a Map - USA | 0 | - | 4.98 | 57,470 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,659 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,851 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,262 |
| Animals - Taxonomy to Common Name | 0 | - | 4.80 | 28,221 |
| Elements by Picture | 0 | - | 4.27 | 69,797 |
| Medical Acronyms | 0 | - | 4.43 | 96,677 |
| Medical Vocabulary | 0 | - | 4.54 | 58,967 |
| Two Letter Answers #4 | 0 | - | 4.27 | 88,791 |
| Two Letter Answers #1 | 0 | - | 4.31 | 108,624 |
| Three Letter Answers #2 | 0 | - | 4.09 | 71,680 |
| Two Letter Answers #3 | 0 | - | 4.15 | 82,564 |
| Three Letter Answers #1 | 0 | - | 4.32 | 73,950 |
| Historical Middle Names | 0 | - | 4.16 | 35,672 |
| People With Place Names | 0 | - | 4.00 | 39,596 |
| People with Food Names | 0 | - | 4.10 | 60,883 |
| First Names of Historical Figures #2 | 0 | - | 4.32 | 40,453 |
| Translations of John | 0 | - | 4.53 | 27,042 |
| First Names of Historical Figures #1 | 0 | - | 4.39 | 229,114 |
| Random Nicknames #1 | 0 | - | 4.11 | 34,808 |
| Birth Names | 0 | - | 4.30 | 61,714 |
| Most Common Last Names in the US | 0 | - | 4.36 | 208,918 |
