| Groups of Two - Science | 0 | - | 4.26 | 48,133 |
| Random Symbol to Element | 0 | - | 4.88 | 92,195 |
| Geographic Groups of Two #1 | 0 | - | 4.99 | 235,779 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 446,666 |
| International Scientific Units | 0 | - | 4.95 | 155,270 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,173 |
| Random Geographic Groups of Five | 0 | - | 4.93 | 113,607 |
| Top Five Countries By Category #2 | 0 | - | 4.93 | 198,260 |
| Top Five Countries By Category #3 | 0 | - | 4.82 | 169,388 |
| Random Geographic Groups of Seven | 0 | - | 4.91 | 45,174 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,090,414 |
| Science General Knowledge #1 | 0 | - | 4.54 | 163,397 |
| Science General Knowledge #2 | 0 | - | 4.47 | 116,598 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,166 |
| Word Chain - Science | 0 | - | 4.59 | 54,379 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,219,440 |
| Five Biggest Immigrant Groups by Country #1 | 0 | - | 4.97 | 179,397 |
| Five Biggest Immigrant Groups by Country #2 | 0 | - | 4.91 | 88,427 |
| Top Five Countries By Fruit Production | 0 | - | 4.96 | 77,131 |
| First Names of Scientists | 0 | - | 4.50 | 56,444 |
| Science Decoder | 0 | - | 4.52 | 28,646 |
| Elements by Symbol | 0 | - | 4.92 | 195,431 |
| Speed Symbol by Element | 0 | - | 4.91 | 103,572 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,822 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,421 |
| Noble Gases | 0 | - | 4.89 | 77,416 |
| Elements that are Gases at Room Temperature | 0 | - | 4.85 | 64,027 |
| Periodic Table Symbols | 0 | - | 4.97 | 70,856 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 80,840 |
| Periodic Table Elements A-Z | 0 | - | 4.78 | 102,173 |
| Name a Valid Element | 0 | - | 4.64 | 69,552 |
| Name the Virus | 0 | - | 4.86 | 76,222 |
| Groups of Things - Sports | 0 | - | 4.27 | 67,494 |
| Groups of Things - History #1 | 0 | - | 4.40 | 93,681 |
| Groups of Things - History #2 | 0 | - | 4.39 | 79,058 |
| History Groups of Two | 0 | - | 4.34 | 40,529 |
| Geographic Groups of Four #1 | 0 | - | 4.70 | 175,472 |
| Geographic Groups of Five #1 | 0 | - | 4.48 | 120,131 |
| Geographic Groups of Seven #1 | 0 | - | 4.63 | 140,572 |
| Geographic Groups of Two #2 | 0 | - | 4.67 | 114,557 |
| Geographic Groups of Six #2 | 0 | - | 4.53 | 52,893 |
| Geographic Groups of Two #3 | 0 | - | 4.46 | 83,525 |
| Geographic Groups of Four #2 | 0 | - | 4.75 | 80,138 |
| Geographic Groups of Five #2 | 0 | - | 4.73 | 63,414 |
| Geographic Groups of Three #2 | 0 | - | 4.55 | 69,303 |
| Geographic Groups of Two #4 | 0 | - | 4.44 | 77,846 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 79,809 |
| Famous Scientists | 0 | - | 4.57 | 42,441 |
| Citrus Fruits | 0 | - | 3.65 | 41,945 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,568 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,695 |
| Elemental Words | 0 | - | 4.96 | 51,973 |
| Metals of Antiquity | 0 | - | 4.94 | 92,881 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 175,774 |
| Three Letter Body Parts | 0 | - | 4.40 | 204,887 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 87,698 |
| Analogies of Countries #1 | 0 | - | 4.88 | 68,155 |
| Best-Selling Video Game Consoles | 0 | - | 4.81 | 269,463 |
| Musical Groups of Things | 0 | - | 4.37 | 31,058 |
| Geographic Groups of Three #1 | 0 | - | 4.35 | 96,530 |
| Geographic Groups of Six #1 | 0 | - | 4.27 | 92,653 |
| Geographic Groups of Eight | 0 | - | 4.38 | 58,630 |
| Geographic Groups of Seven #2 | 0 | - | 4.04 | 35,219 |
| Name a Valid Answer - Geography | 0 | - | 4.95 | 103,452 |
| Category Elimination - Elements | 0 | - | 4.62 | 53,212 |
| Astronomy Decoder | 0 | - | 4.50 | 37,832 |
| Five Biggest Immigrant Groups by Country #3 | 0 | - | 4.70 | 65,866 |
| Scientific Names | 0 | - | 4.32 | 78,145 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,586,375 |
| Random Geographic Groups of Six | 0 | - | 4.40 | 49,405 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,018 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,900 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.72 | 187,214 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,178 |
| Astronomy Quiz | 0 | - | 4.89 | 81,656 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 135,694 |
| Solar System Trivia | 0 | - | 4.93 | 45,989 |
| Body Part Cliches | 0 | - | 4.43 | 123,026 |
| Bones of the Human Body | 0 | - | 4.56 | 34,710 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,078 |
| Italian Name Translation | 0 | - | 4.81 | 44,975 |
| Songs that Start with the Same Word | 0 | - | 4.87 | 109,894 |
| Word Scramble - Countries | 0 | - | 4.86 | 2,087,463 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 163,070 |
| Solve the Secret Country #2 | 0 | - | 4.85 | 116,034 |
| Anagram Chain - Countries | 0 | - | 4.99 | 115,187 |
| 7 Deadly Sins | 0 | - | 4.88 | 394,700 |
| Geography Quiz for Dummies | 0 | - | 4.87 | 107,780 |
| Disney Animated Characters | 0 | - | 4.88 | 598,976 |
| Conspiracy Theories – Mostly U.S. | 0 | - | 4.44 | 56,230 |
| MLB Baseball Groups of Things | 0 | - | 4.06 | 18,467 |
| Literary Groups of Things | 0 | - | 4.26 | 30,535 |
| Top Five Languages by Language Family | 0 | - | 4.99 | 53,332 |
| Countries with Four Letters | 0 | - | 4.99 | 418,381 |
| 4-Letter Geography Chain #1 | 0 | - | 4.82 | 169,145 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,521 |
| Eight Most Popular Berries | 0 | - | 4.43 | 98,543 |
| Top 20 Fruits Sold in the U.S. | 0 | - | 4.44 | 66,956 |
| Name a Valid World City | 0 | - | 4.83 | 70,088 |
| Countries but all Vowels are Changed to O | 0 | - | 4.92 | 67,768 |
| Solve the Secret Country #3 | 0 | - | 4.98 | 63,145 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,061 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 214,530 |
| Fruits: No Vowels | 0 | - | 4.81 | 98,490 |
| Countries of the World with an Empty Map - Hard Version | 0 | - | 5.00 | 302,628 |
| Islands by Country #1 | 0 | - | 4.87 | 174,453 |
| Regions of Countries #1 | 0 | - | 4.97 | 158,884 |
| Regions of Countries #2 | 0 | - | 4.95 | 123,256 |
| Regions of Countries #3 | 0 | - | 4.84 | 90,320 |
| Groups of Two - Movies | 0 | - | 3.97 | 23,326 |
| Country Chain | 0 | - | 4.96 | 215,665 |
| Can You Name These 50 Random Countries? | 0 | - | 4.98 | 213,703 |
| Cold War Decoder | 0 | - | 4.83 | 51,906 |
| Name a Valid Year in History | 0 | - | 4.93 | 66,359 |
| Name a Valid First-Level Subdivision for Every Country | 0 | - | 4.97 | 49,588 |
| Name a Valid Country #3 | 0 | - | 4.99 | 259,732 |
| Name a Valid Country #1 | 0 | - | 4.99 | 283,302 |
| Name a Valid Country #2 | 0 | - | 4.98 | 246,313 |
| Name a Valid Country #4 | 0 | - | 4.97 | 251,469 |
| Name a Valid Country #5 | 0 | - | 4.99 | 189,719 |
| Name a Valid Country #6 | 0 | - | 4.95 | 126,337 |
| Name a Valid Country #7 | 0 | - | 4.91 | 126,410 |
| Name a Valid Country #8 | 0 | - | 4.85 | 95,958 |
| Random Name a Valid Bordering Country | 0 | - | 4.99 | 74,186 |
| Name a Valid Country #10 | 0 | - | 4.93 | 41,388 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,234 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,086 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,241 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,346 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,327 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 150,606 |
| Environmental Issues | 0 | - | 4.54 | 26,717 |
| Countries by Languages in 90 Seconds | 0 | - | 4.93 | 711,181 |
| Chuck Norris Facts | 0 | - | 4.50 | 8,035 |
| Two Letter Answers #2 | 0 | - | 4.43 | 86,011 |
| One Letter Answers #1 | 0 | - | 4.47 | 77,381 |
| Guess a Top 5 Last Name by Country | 0 | - | 4.64 | 45,097 |
| Shared First Names #2 | 0 | - | 4.53 | 44,975 |
| People with J Initials | 0 | - | 4.51 | 55,211 |
| History Analogies #1 | 0 | - | 4.53 | 89,769 |
| History Analogies #2 | 0 | - | 4.49 | 76,988 |
| History Analogies #3 | 0 | - | 4.61 | 80,420 |
| English Idioms #1 | 0 | - | 4.45 | 144,268 |
| Cliche Quotes Quiz #2 | 0 | - | 4.43 | 45,229 |
| Clothing Idioms | 0 | - | 4.41 | 34,052 |
| Are You a Nerd? | 0 | - | 4.35 | 44,493 |
| The Eleven Colors | 0 | - | 4.73 | 233,246 |
| King in the Answers | 0 | - | 4.42 | 49,613 |
| Super in the Answers | 0 | - | 4.52 | 109,334 |
| Four Letter Geography #1 | 0 | - | 4.69 | 89,081 |
| Five Letter Geography #3 | 0 | - | 4.61 | 130,748 |
| Six Letter Geography #1 | 0 | - | 4.42 | 114,303 |
| Six Letter Geography #2 | 0 | - | 4.69 | 67,399 |
| Six Letter Geography #3 | 0 | - | 4.53 | 81,423 |
| Seven Letter Geography #1 | 0 | - | 4.52 | 71,970 |
| Seven Letter Geography #3 | 0 | - | 4.50 | 37,660 |
| Eight Letter Geography #1 | 0 | - | 4.45 | 38,446 |
| Five Letter Geography #1 | 0 | - | 4.48 | 151,109 |
| Five Letter Geography #4 | 0 | - | 4.78 | 84,573 |
| Five Letter Geography - Hero Mode | 0 | - | 4.63 | 35,435 |
| Random History by Country | 0 | - | 4.53 | 34,650 |
| Geography Decoder | 0 | - | 4.53 | 75,333 |
| Continental Geography Decoder | 0 | - | 4.46 | 52,372 |
| Letter A Geography Chain | 0 | - | 4.53 | 67,313 |
| 6-Letter Movie Chain #3 | 0 | - | 4.43 | 36,063 |
| Fruit & Vegetable Varieties Quiz | 0 | - | 4.30 | 58,107 |
| Fruits by Picture | 0 | - | 4.20 | 804,515 |
| Plants as Key Ingredient | 0 | - | 4.40 | 46,155 |
| Answers are Beverages | 0 | - | 4.10 | 61,047 |
| Basic Cake Ingredients | 0 | - | 4.22 | 109,743 |
| Types of Food | 0 | - | 4.24 | 89,120 |
| The Foods they Ate | 0 | - | 4.03 | 69,189 |
| Animals Used in Food | 0 | - | 4.29 | 77,623 |
| Most Popular Fruits | 0 | - | 4.16 | 96,197 |
| Healthiest Fruits and Vegetables | 0 | - | 4.04 | 46,635 |
| 10 Most Popular Pizza Toppings | 0 | - | 4.06 | 84,691 |
| Valid Answer - World History #1 | 0 | - | 4.56 | 61,530 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 316,888 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,623 |
| Obfuscations of Movie Titles #1 | 0 | - | 4.93 | 61,737 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.42 | 319,260 |
| U.S. Groups of Four Quiz | 0 | - | 4.39 | 25,180 |
| U.S. Groups of Three Quiz | 0 | - | 4.04 | 20,798 |
| The Only Country ... | 0 | - | 4.91 | 79,820 |
| 20 Random Countries on an Empty World Map | 0 | - | 4.98 | 122,390 |
| Random Countries by Borders | 0 | - | 4.99 | 81,642 |
| Top Five Countries by Random Categories | 0 | - | 4.95 | 136,891 |
| Random Name a Valid Country | 0 | - | 4.99 | 203,156 |
| Random Point on Land to Country | 0 | - | 4.99 | 231,746 |
| World Countries by 10 Category Elimination #1 | 0 | - | 4.97 | 121,391 |
| Category Elimination - Countries #2 | 0 | - | 4.98 | 233,475 |
| Category Elimination - Countries #3 | 0 | - | 4.99 | 222,719 |
| Category Elimination - Countries #4 | 0 | - | 4.99 | 190,239 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,737 |
| Name a Valid Island Country | 0 | - | 4.96 | 114,017 |
| Country Quiz on a Map - USA | 0 | - | 4.98 | 56,791 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,368 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,646 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,153 |
| Elements by Picture | 0 | - | 4.28 | 69,529 |
