| Groups of Two - Science | 0 | - | 4.26 | 48,245 |
| Random Symbol to Element | 0 | - | 4.88 | 92,684 |
| Geographic Groups of Two #1 | 0 | - | 4.99 | 236,534 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 448,546 |
| International Scientific Units | 0 | - | 4.95 | 156,260 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,550 |
| Random Geographic Groups of Five | 0 | - | 4.93 | 114,229 |
| Top Five Countries By Category #2 | 0 | - | 4.93 | 199,278 |
| Top Five Countries By Category #3 | 0 | - | 4.81 | 170,517 |
| Random Geographic Groups of Seven | 0 | - | 4.91 | 45,742 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,094,962 |
| Science General Knowledge #1 | 0 | - | 4.54 | 164,599 |
| Science General Knowledge #2 | 0 | - | 4.48 | 117,609 |
| Science General Knowledge #3 | 0 | - | 4.55 | 102,708 |
| Word Chain - Science | 0 | - | 4.59 | 54,709 |
| Groups of Things - History #1 | 0 | - | 4.41 | 93,935 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,234,590 |
| Five Biggest Immigrant Groups by Country #1 | 0 | - | 4.97 | 180,425 |
| Five Biggest Immigrant Groups by Country #2 | 0 | - | 4.91 | 88,842 |
| Top Five Countries By Fruit Production | 0 | - | 4.96 | 78,619 |
| First Names of Scientists | 0 | - | 4.50 | 56,698 |
| Science Decoder | 0 | - | 4.52 | 28,713 |
| Elements by Symbol | 0 | - | 4.92 | 196,583 |
| Speed Symbol by Element | 0 | - | 4.91 | 104,324 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,945 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,809 |
| Noble Gases | 0 | - | 4.89 | 77,908 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 64,390 |
| Periodic Table Symbols | 0 | - | 4.97 | 71,752 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 81,365 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 102,642 |
| Name a Valid Element | 0 | - | 4.64 | 69,871 |
| Name the Virus | 0 | - | 4.87 | 76,591 |
| Groups of Things - Sports | 0 | - | 4.27 | 67,668 |
| Groups of Things - History #2 | 0 | - | 4.39 | 79,242 |
| History Groups of Two | 0 | - | 4.34 | 40,638 |
| Geographic Groups of Four #1 | 0 | - | 4.70 | 175,812 |
| Geographic Groups of Five #1 | 0 | - | 4.47 | 120,498 |
| Geographic Groups of Seven #1 | 0 | - | 4.63 | 140,881 |
| Geographic Groups of Two #2 | 0 | - | 4.67 | 114,923 |
| Geographic Groups of Six #2 | 0 | - | 4.53 | 53,100 |
| Geographic Groups of Two #3 | 0 | - | 4.46 | 83,842 |
| Geographic Groups of Four #2 | 0 | - | 4.75 | 80,488 |
| Geographic Groups of Five #2 | 0 | - | 4.73 | 63,751 |
| Geographic Groups of Three #2 | 0 | - | 4.55 | 69,600 |
| Geographic Groups of Two #4 | 0 | - | 4.45 | 78,124 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 80,284 |
| Famous Scientists | 0 | - | 4.57 | 42,563 |
| Citrus Fruits | 0 | - | 3.63 | 42,018 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,843 |
| Answers are Elements #1 | 0 | - | 4.29 | 52,778 |
| Elemental Words | 0 | - | 4.96 | 52,175 |
| Metals of Antiquity | 0 | - | 4.94 | 93,230 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 176,145 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,469 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 88,003 |
| Analogies of Countries #1 | 0 | - | 4.88 | 68,307 |
| Best-Selling Video Game Consoles | 0 | - | 4.82 | 272,844 |
| Musical Groups of Things | 0 | - | 4.37 | 31,142 |
| Geographic Groups of Three #1 | 0 | - | 4.35 | 96,645 |
| Geographic Groups of Six #1 | 0 | - | 4.27 | 92,763 |
| Geographic Groups of Eight | 0 | - | 4.39 | 58,727 |
| Geographic Groups of Seven #2 | 0 | - | 4.04 | 35,351 |
| Name a Valid Answer - Geography | 0 | - | 4.95 | 104,037 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,520 |
| Astronomy Decoder | 0 | - | 4.50 | 37,967 |
| Five Biggest Immigrant Groups by Country #3 | 0 | - | 4.70 | 66,142 |
| Scientific Names | 0 | - | 4.32 | 78,340 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,609,978 |
| Random Geographic Groups of Six | 0 | - | 4.40 | 49,731 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,339 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,963 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 188,118 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,400 |
| Astronomy Quiz | 0 | - | 4.90 | 82,270 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 136,671 |
| Solar System Trivia | 0 | - | 4.93 | 46,413 |
| Body Part Cliches | 0 | - | 4.43 | 123,225 |
| Bones of the Human Body | 0 | - | 4.52 | 41,887 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,964 |
| Italian Name Translation | 0 | - | 4.81 | 46,219 |
| Songs that Start with the Same Word | 0 | - | 4.87 | 110,450 |
| Word Scramble - Countries | 0 | - | 4.86 | 2,096,453 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 164,768 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 117,511 |
| Anagram Chain - Countries | 0 | - | 4.98 | 116,031 |
| 7 Deadly Sins | 0 | - | 4.88 | 398,473 |
| Geography Quiz for Dummies | 0 | - | 4.87 | 108,365 |
| Disney Animated Characters | 0 | - | 4.88 | 600,706 |
| Conspiracy Theories – Mostly U.S. | 0 | - | 4.44 | 56,419 |
| MLB Baseball Groups of Things | 0 | - | 4.08 | 18,522 |
| Literary Groups of Things | 0 | - | 4.26 | 30,601 |
| Top Five Languages by Language Family | 0 | - | 4.99 | 53,766 |
| Countries with Four Letters | 0 | - | 4.99 | 421,068 |
| 4-Letter Geography Chain #1 | 0 | - | 4.81 | 169,754 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,823 |
| Eight Most Popular Berries | 0 | - | 4.43 | 99,125 |
| Top 20 Fruits Sold in the U.S. | 0 | - | 4.44 | 67,509 |
| Name a Valid World City | 0 | - | 4.83 | 70,802 |
| Countries but all Vowels are Changed to O | 0 | - | 4.93 | 68,958 |
| Solve the Secret Country #3 | 0 | - | 4.98 | 64,075 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,105 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 215,444 |
| Fruits: No Vowels | 0 | - | 4.81 | 99,239 |
| Countries of the World with an Empty Map - Hard Version | 0 | - | 5.00 | 304,242 |
| Islands by Country #1 | 0 | - | 4.88 | 174,979 |
| Regions of Countries #1 | 0 | - | 4.96 | 159,269 |
| Regions of Countries #2 | 0 | - | 4.95 | 123,615 |
| Regions of Countries #3 | 0 | - | 4.85 | 90,573 |
| Groups of Two - Movies | 0 | - | 3.97 | 23,379 |
| Country Chain | 0 | - | 4.96 | 216,643 |
| Can You Name These 50 Random Countries? | 0 | - | 4.98 | 215,556 |
| Cold War Decoder | 0 | - | 4.83 | 52,202 |
| Name a Valid Year in History | 0 | - | 4.93 | 66,922 |
| Name a Valid First-Level Subdivision for Every Country | 0 | - | 4.97 | 49,878 |
| Name a Valid Country #3 | 0 | - | 4.99 | 262,178 |
| Name a Valid Country #1 | 0 | - | 4.99 | 287,943 |
| Name a Valid Country #2 | 0 | - | 4.98 | 249,648 |
| Name a Valid Country #4 | 0 | - | 4.97 | 254,604 |
| Name a Valid Country #5 | 0 | - | 4.99 | 205,887 |
| Name a Valid Country #6 | 0 | - | 4.94 | 128,684 |
| Name a Valid Country #7 | 0 | - | 4.91 | 128,584 |
| Name a Valid Country #8 | 0 | - | 4.85 | 97,955 |
| Random Name a Valid Bordering Country | 0 | - | 4.99 | 75,105 |
| Name a Valid Country #10 | 0 | - | 4.93 | 42,468 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,344 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,231 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,473 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,601 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,467 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 151,275 |
| Environmental Issues | 0 | - | 4.54 | 26,793 |
| Countries by Languages in 90 Seconds | 0 | - | 4.93 | 717,766 |
| Chuck Norris Facts | 0 | - | 4.51 | 8,317 |
| Two Letter Answers #2 | 0 | - | 4.43 | 86,265 |
| One Letter Answers #1 | 0 | - | 4.47 | 77,470 |
| Guess a Top 5 Last Name by Country | 0 | - | 4.63 | 45,493 |
| Shared First Names #2 | 0 | - | 4.53 | 45,208 |
| People with J Initials | 0 | - | 4.51 | 55,371 |
| History Analogies #1 | 0 | - | 4.53 | 89,893 |
| History Analogies #2 | 0 | - | 4.49 | 77,135 |
| History Analogies #3 | 0 | - | 4.61 | 80,578 |
| English Idioms #1 | 0 | - | 4.45 | 145,242 |
| Cliche Quotes Quiz #2 | 0 | - | 4.43 | 45,351 |
| Clothing Idioms | 0 | - | 4.41 | 34,153 |
| Are You a Nerd? | 0 | - | 4.35 | 44,746 |
| The Eleven Colors | 0 | - | 4.73 | 234,755 |
| King in the Answers | 0 | - | 4.42 | 49,908 |
| Super in the Answers | 0 | - | 4.52 | 109,780 |
| Four Letter Geography #1 | 0 | - | 4.69 | 89,271 |
| Five Letter Geography #3 | 0 | - | 4.61 | 131,093 |
| Six Letter Geography #1 | 0 | - | 4.42 | 114,517 |
| Six Letter Geography #2 | 0 | - | 4.68 | 67,551 |
| Six Letter Geography #3 | 0 | - | 4.52 | 81,630 |
| Seven Letter Geography #1 | 0 | - | 4.52 | 72,341 |
| Seven Letter Geography #3 | 0 | - | 4.50 | 37,949 |
| Eight Letter Geography #1 | 0 | - | 4.45 | 38,513 |
| Five Letter Geography #1 | 0 | - | 4.48 | 151,398 |
| Five Letter Geography #4 | 0 | - | 4.78 | 84,792 |
| Five Letter Geography - Hero Mode | 0 | - | 4.63 | 35,514 |
| Random History by Country | 0 | - | 4.53 | 34,786 |
| Geography Decoder | 0 | - | 4.53 | 75,526 |
| Continental Geography Decoder | 0 | - | 4.46 | 52,538 |
| Letter A Geography Chain | 0 | - | 4.54 | 67,482 |
| 6-Letter Movie Chain #3 | 0 | - | 4.43 | 36,213 |
| Fruit & Vegetable Varieties Quiz | 0 | - | 4.30 | 58,329 |
| Fruits by Picture | 0 | - | 4.19 | 806,320 |
| Plants as Key Ingredient | 0 | - | 4.40 | 46,354 |
| Answers are Beverages | 0 | - | 4.10 | 61,274 |
| Basic Cake Ingredients | 0 | - | 4.23 | 110,385 |
| Types of Food | 0 | - | 4.24 | 89,493 |
| The Foods they Ate | 0 | - | 4.03 | 69,383 |
| Animals Used in Food | 0 | - | 4.28 | 77,956 |
| Most Popular Fruits | 0 | - | 4.16 | 96,496 |
| Healthiest Fruits and Vegetables | 0 | - | 4.02 | 46,735 |
| 10 Most Popular Pizza Toppings | 0 | - | 4.06 | 85,058 |
| Valid Answer - World History #1 | 0 | - | 4.56 | 61,771 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 319,310 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,837 |
| Movie Title Antonyms #1 | 0 | - | 4.81 | 195,212 |
| Obfuscations of Movie Titles #1 | 0 | - | 4.93 | 61,917 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.42 | 321,101 |
| U.S. Groups of Four Quiz | 0 | - | 4.39 | 25,274 |
| U.S. Groups of Three Quiz | 0 | - | 4.04 | 20,856 |
| The Only Country ... | 0 | - | 4.91 | 80,634 |
| 20 Random Countries on an Empty World Map | 0 | - | 4.98 | 123,615 |
| Random Countries by Borders | 0 | - | 4.99 | 82,181 |
| Top Five Countries by Random Categories | 0 | - | 4.95 | 138,661 |
| Random Name a Valid Country | 0 | - | 4.99 | 204,426 |
| Random Point on Land to Country | 0 | - | 4.99 | 233,398 |
| World Countries by 10 Category Elimination #1 | 0 | - | 4.97 | 122,351 |
| Category Elimination - Countries #2 | 0 | - | 4.98 | 235,127 |
| Category Elimination - Countries #3 | 0 | - | 4.99 | 224,202 |
| Category Elimination - Countries #4 | 0 | - | 4.99 | 191,521 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 80,556 |
| Name a Valid Island Country | 0 | - | 4.96 | 114,647 |
| Country Quiz on a Map - USA | 0 | - | 4.98 | 57,437 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,634 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,832 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,259 |
