| Groups of Two - Science | 0 | - | 4.26 | 48,132 |
| Random Symbol to Element | 0 | - | 4.88 | 92,189 |
| Geographic Groups of Two #1 | 0 | - | 4.99 | 235,774 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 446,652 |
| International Scientific Units | 0 | - | 4.95 | 155,247 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,159 |
| Random Geographic Groups of Five | 0 | - | 4.93 | 113,601 |
| Top Five Countries By Category #2 | 0 | - | 4.93 | 198,252 |
| Top Five Countries By Category #3 | 0 | - | 4.82 | 169,379 |
| Random Geographic Groups of Seven | 0 | - | 4.91 | 45,172 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,090,380 |
| Science General Knowledge #1 | 0 | - | 4.54 | 163,387 |
| Science General Knowledge #2 | 0 | - | 4.47 | 116,591 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,161 |
| Word Chain - Science | 0 | - | 4.59 | 54,378 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,219,206 |
| Five Biggest Immigrant Groups by Country #1 | 0 | - | 4.97 | 179,393 |
| Five Biggest Immigrant Groups by Country #2 | 0 | - | 4.91 | 88,423 |
| Top Five Countries By Fruit Production | 0 | - | 4.96 | 77,113 |
| First Names of Scientists | 0 | - | 4.50 | 56,443 |
| Science Decoder | 0 | - | 4.52 | 28,643 |
| Elements by Symbol | 0 | - | 4.92 | 195,415 |
| Speed Symbol by Element | 0 | - | 4.91 | 103,564 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,822 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,409 |
| Noble Gases | 0 | - | 4.89 | 77,410 |
| Elements that are Gases at Room Temperature | 0 | - | 4.85 | 64,023 |
| Periodic Table Symbols | 0 | - | 4.97 | 70,848 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 80,832 |
| Periodic Table Elements A-Z | 0 | - | 4.78 | 102,168 |
| Name a Valid Element | 0 | - | 4.64 | 69,551 |
| Name the Virus | 0 | - | 4.86 | 76,213 |
| Groups of Things - Sports | 0 | - | 4.27 | 67,493 |
| Groups of Things - History #1 | 0 | - | 4.40 | 93,675 |
| Groups of Things - History #2 | 0 | - | 4.39 | 79,056 |
| History Groups of Two | 0 | - | 4.34 | 40,529 |
| Geographic Groups of Four #1 | 0 | - | 4.70 | 175,471 |
| 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 | 114,554 |
| Geographic Groups of Six #2 | 0 | - | 4.53 | 52,891 |
| Geographic Groups of Two #3 | 0 | - | 4.46 | 83,523 |
| Geographic Groups of Four #2 | 0 | - | 4.75 | 80,135 |
| Geographic Groups of Five #2 | 0 | - | 4.73 | 63,411 |
| Geographic Groups of Three #2 | 0 | - | 4.55 | 69,297 |
| Geographic Groups of Two #4 | 0 | - | 4.44 | 77,842 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 79,777 |
| Famous Scientists | 0 | - | 4.57 | 42,435 |
| Citrus Fruits | 0 | - | 3.65 | 41,945 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,566 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,695 |
| Elemental Words | 0 | - | 4.96 | 51,969 |
| Metals of Antiquity | 0 | - | 4.94 | 92,875 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 175,766 |
| Three Letter Body Parts | 0 | - | 4.39 | 204,874 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 87,691 |
| Analogies of Countries #1 | 0 | - | 4.88 | 68,153 |
| Best-Selling Video Game Consoles | 0 | - | 4.81 | 269,442 |
| Musical Groups of Things | 0 | - | 4.37 | 31,057 |
| Geographic Groups of Three #1 | 0 | - | 4.35 | 96,529 |
| Geographic Groups of Six #1 | 0 | - | 4.27 | 92,652 |
| 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 | 103,447 |
| Category Elimination - Elements | 0 | - | 4.62 | 53,210 |
| Astronomy Decoder | 0 | - | 4.50 | 37,831 |
| Five Biggest Immigrant Groups by Country #3 | 0 | - | 4.70 | 65,866 |
| Scientific Names | 0 | - | 4.32 | 78,137 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,586,192 |
| Random Geographic Groups of Six | 0 | - | 4.40 | 49,404 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,015 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,900 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.72 | 187,209 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,177 |
| Astronomy Quiz | 0 | - | 4.89 | 81,644 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 135,684 |
| Solar System Trivia | 0 | - | 4.93 | 45,979 |
| Body Part Cliches | 0 | - | 4.43 | 123,008 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,065 |
| Songs that Start with the Same Word | 0 | - | 4.87 | 109,887 |
| Word Scramble - Countries | 0 | - | 4.86 | 2,087,350 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 163,051 |
| Solve the Secret Country #2 | 0 | - | 4.85 | 116,019 |
| Anagram Chain - Countries | 0 | - | 4.99 | 115,180 |
| 7 Deadly Sins | 0 | - | 4.88 | 394,676 |
| Geography Quiz for Dummies | 0 | - | 4.87 | 107,770 |
| Disney Animated Characters | 0 | - | 4.88 | 598,966 |
| Conspiracy Theories – Mostly U.S. | 0 | - | 4.44 | 56,229 |
| MLB Baseball Groups of Things | 0 | - | 4.06 | 18,466 |
| Literary Groups of Things | 0 | - | 4.26 | 30,534 |
| Top Five Languages by Language Family | 0 | - | 4.99 | 53,328 |
| Countries with Four Letters | 0 | - | 4.99 | 418,362 |
| 4-Letter Geography Chain #1 | 0 | - | 4.82 | 169,138 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,520 |
| Eight Most Popular Berries | 0 | - | 4.43 | 98,539 |
| Top 20 Fruits Sold in the U.S. | 0 | - | 4.44 | 66,952 |
| Name a Valid World City | 0 | - | 4.83 | 70,082 |
| Countries but all Vowels are Changed to O | 0 | - | 4.92 | 67,762 |
| Solve the Secret Country #3 | 0 | - | 4.98 | 63,132 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,059 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 214,520 |
| Fruits: No Vowels | 0 | - | 4.81 | 98,475 |
| Countries of the World with an Empty Map - Hard Version | 0 | - | 5.00 | 302,615 |
| Islands by Country #1 | 0 | - | 4.87 | 174,446 |
| Regions of Countries #1 | 0 | - | 4.97 | 158,882 |
| Regions of Countries #2 | 0 | - | 4.95 | 123,254 |
| Regions of Countries #3 | 0 | - | 4.84 | 90,318 |
| Groups of Two - Movies | 0 | - | 3.97 | 23,325 |
| Country Chain | 0 | - | 4.96 | 215,655 |
| Can You Name These 50 Random Countries? | 0 | - | 4.98 | 213,690 |
| Cold War Decoder | 0 | - | 4.83 | 51,903 |
| Name a Valid Year in History | 0 | - | 4.93 | 66,355 |
| Name a Valid First-Level Subdivision for Every Country | 0 | - | 4.97 | 49,588 |
| Name a Valid Country #3 | 0 | - | 4.99 | 259,721 |
| Name a Valid Country #1 | 0 | - | 4.99 | 283,269 |
| Name a Valid Country #2 | 0 | - | 4.98 | 246,292 |
| Name a Valid Country #4 | 0 | - | 4.97 | 251,452 |
| Name a Valid Country #5 | 0 | - | 4.99 | 189,706 |
| Name a Valid Country #6 | 0 | - | 4.94 | 126,326 |
| Name a Valid Country #7 | 0 | - | 4.91 | 126,397 |
| Name a Valid Country #8 | 0 | - | 4.85 | 95,945 |
| Random Name a Valid Bordering Country | 0 | - | 4.99 | 74,178 |
| Name a Valid Country #10 | 0 | - | 4.93 | 41,380 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,232 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,073 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,237 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,346 |
| Science Multiple Choice #2 | 0 | - | 4.40 | 36,324 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 150,566 |
| Environmental Issues | 0 | - | 4.54 | 26,716 |
| Countries by Languages in 90 Seconds | 0 | - | 4.93 | 711,125 |
| Chuck Norris Facts | 0 | - | 4.50 | 8,033 |
| Two Letter Answers #2 | 0 | - | 4.43 | 86,010 |
| One Letter Answers #1 | 0 | - | 4.47 | 77,380 |
| Guess a Top 5 Last Name by Country | 0 | - | 4.64 | 45,094 |
| Shared First Names #2 | 0 | - | 4.53 | 44,971 |
| People with J Initials | 0 | - | 4.51 | 55,208 |
| History Analogies #1 | 0 | - | 4.53 | 89,766 |
| History Analogies #2 | 0 | - | 4.49 | 76,986 |
| History Analogies #3 | 0 | - | 4.61 | 80,420 |
| English Idioms #1 | 0 | - | 4.45 | 144,247 |
| Cliche Quotes Quiz #2 | 0 | - | 4.43 | 45,226 |
| Clothing Idioms | 0 | - | 4.41 | 34,052 |
| Are You a Nerd? | 0 | - | 4.35 | 44,492 |
| The Eleven Colors | 0 | - | 4.73 | 233,239 |
| King in the Answers | 0 | - | 4.42 | 49,610 |
| Super in the Answers | 0 | - | 4.52 | 109,326 |
| Four Letter Geography #1 | 0 | - | 4.69 | 89,079 |
| Five Letter Geography #3 | 0 | - | 4.61 | 130,745 |
| Six Letter Geography #1 | 0 | - | 4.42 | 114,300 |
| 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 | 71,969 |
| Seven Letter Geography #3 | 0 | - | 4.50 | 37,659 |
| Eight Letter Geography #1 | 0 | - | 4.45 | 38,445 |
| Five Letter Geography #1 | 0 | - | 4.48 | 151,109 |
| Five Letter Geography #4 | 0 | - | 4.78 | 84,571 |
| Five Letter Geography - Hero Mode | 0 | - | 4.63 | 35,434 |
| 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 | 67,309 |
| 6-Letter Movie Chain #3 | 0 | - | 4.43 | 36,063 |
| Fruit & Vegetable Varieties Quiz | 0 | - | 4.30 | 58,100 |
| Fruits by Picture | 0 | - | 4.20 | 804,498 |
| Plants as Key Ingredient | 0 | - | 4.40 | 46,150 |
| Answers are Beverages | 0 | - | 4.10 | 61,039 |
| Basic Cake Ingredients | 0 | - | 4.22 | 109,739 |
| Types of Food | 0 | - | 4.24 | 89,115 |
| The Foods they Ate | 0 | - | 4.03 | 69,185 |
| Animals Used in Food | 0 | - | 4.29 | 77,619 |
| Most Popular Fruits | 0 | - | 4.16 | 96,194 |
| Healthiest Fruits and Vegetables | 0 | - | 4.04 | 46,634 |
| 10 Most Popular Pizza Toppings | 0 | - | 4.06 | 84,687 |
| Valid Answer - World History #1 | 0 | - | 4.56 | 61,528 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 316,859 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,618 |
| Obfuscations of Movie Titles #1 | 0 | - | 4.93 | 61,733 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.42 | 319,259 |
| 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 | 79,816 |
| 20 Random Countries on an Empty World Map | 0 | - | 4.98 | 122,382 |
| Random Countries by Borders | 0 | - | 4.99 | 81,634 |
| Top Five Countries by Random Categories | 0 | - | 4.95 | 136,752 |
| Random Name a Valid Country | 0 | - | 4.99 | 203,153 |
| Random Point on Land to Country | 0 | - | 4.98 | 231,731 |
| World Countries by 10 Category Elimination #1 | 0 | - | 4.97 | 121,375 |
| Category Elimination - Countries #2 | 0 | - | 4.98 | 233,456 |
| Category Elimination - Countries #3 | 0 | - | 4.99 | 222,709 |
| Category Elimination - Countries #4 | 0 | - | 4.99 | 190,228 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,733 |
| Name a Valid Island Country | 0 | - | 4.96 | 114,012 |
| Country Quiz on a Map - USA | 0 | - | 4.98 | 56,785 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,364 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,643 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,151 |
| Elements by Picture | 0 | - | 4.28 | 69,525 |
| Medical Acronyms | 0 | - | 4.43 | 96,110 |
| Medical Vocabulary | 0 | - | 4.54 | 58,509 |
