| Groups of Two - Science | 0 | - | 4.26 | 48,123 |
| Random Symbol to Element | 0 | - | 4.88 | 92,134 |
| Geographic Groups of Two #1 | 0 | - | 4.99 | 235,718 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 446,548 |
| International Scientific Units | 0 | - | 4.95 | 155,104 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,061 |
| Random Geographic Groups of Five | 0 | - | 4.93 | 113,566 |
| Top Five Countries By Category #2 | 0 | - | 4.93 | 198,204 |
| Top Five Countries By Category #3 | 0 | - | 4.82 | 169,325 |
| Random Geographic Groups of Seven | 0 | - | 4.91 | 45,135 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,090,066 |
| Science General Knowledge #1 | 0 | - | 4.54 | 163,341 |
| Science General Knowledge #2 | 0 | - | 4.47 | 116,559 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,128 |
| Word Chain - Science | 0 | - | 4.59 | 54,365 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,218,256 |
| Five Biggest Immigrant Groups by Country #1 | 0 | - | 4.97 | 179,346 |
| Five Biggest Immigrant Groups by Country #2 | 0 | - | 4.91 | 88,396 |
| Top Five Countries By Fruit Production | 0 | - | 4.96 | 77,019 |
| First Names of Scientists | 0 | - | 4.50 | 56,434 |
| Science Decoder | 0 | - | 4.52 | 28,638 |
| Elements by Symbol | 0 | - | 4.92 | 195,285 |
| Speed Symbol by Element | 0 | - | 4.91 | 103,465 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,812 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,358 |
| Noble Gases | 0 | - | 4.89 | 77,343 |
| Elements that are Gases at Room Temperature | 0 | - | 4.85 | 63,974 |
| Periodic Table Symbols | 0 | - | 4.97 | 70,771 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 80,757 |
| Periodic Table Elements A-Z | 0 | - | 4.78 | 102,137 |
| Name a Valid Element | 0 | - | 4.64 | 69,526 |
| Name the Virus | 0 | - | 4.86 | 76,181 |
| Groups of Things - Sports | 0 | - | 4.27 | 67,474 |
| Groups of Things - History #1 | 0 | - | 4.40 | 93,654 |
| Groups of Things - History #2 | 0 | - | 4.39 | 79,041 |
| History Groups of Two | 0 | - | 4.34 | 40,526 |
| Geographic Groups of Four #1 | 0 | - | 4.70 | 175,456 |
| Geographic Groups of Five #1 | 0 | - | 4.48 | 120,122 |
| Geographic Groups of Seven #1 | 0 | - | 4.63 | 140,555 |
| Geographic Groups of Two #2 | 0 | - | 4.67 | 114,540 |
| Geographic Groups of Six #2 | 0 | - | 4.53 | 52,879 |
| Geographic Groups of Two #3 | 0 | - | 4.46 | 83,504 |
| Geographic Groups of Four #2 | 0 | - | 4.75 | 80,113 |
| Geographic Groups of Five #2 | 0 | - | 4.73 | 63,395 |
| Geographic Groups of Three #2 | 0 | - | 4.55 | 69,281 |
| Geographic Groups of Two #4 | 0 | - | 4.44 | 77,825 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 79,728 |
| Famous Scientists | 0 | - | 4.57 | 42,397 |
| Citrus Fruits | 0 | - | 3.65 | 41,941 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,543 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,687 |
| Elemental Words | 0 | - | 4.96 | 51,937 |
| Metals of Antiquity | 0 | - | 4.94 | 92,835 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 175,718 |
| Three Letter Body Parts | 0 | - | 4.39 | 204,792 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 87,630 |
| Analogies of Countries #1 | 0 | - | 4.88 | 68,138 |
| Best-Selling Video Game Consoles | 0 | - | 4.81 | 269,214 |
| Musical Groups of Things | 0 | - | 4.37 | 31,045 |
| Geographic Groups of Three #1 | 0 | - | 4.35 | 96,521 |
| Geographic Groups of Six #1 | 0 | - | 4.27 | 92,649 |
| Geographic Groups of Eight | 0 | - | 4.38 | 58,623 |
| Geographic Groups of Seven #2 | 0 | - | 4.04 | 35,212 |
| Name a Valid Answer - Geography | 0 | - | 4.95 | 103,410 |
| Category Elimination - Elements | 0 | - | 4.62 | 53,183 |
| Astronomy Decoder | 0 | - | 4.50 | 37,818 |
| Five Biggest Immigrant Groups by Country #3 | 0 | - | 4.70 | 65,851 |
| Scientific Names | 0 | - | 4.32 | 78,107 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,584,852 |
| Random Geographic Groups of Six | 0 | - | 4.40 | 49,384 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 85,992 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,895 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.72 | 187,148 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,160 |
| Astronomy Quiz | 0 | - | 4.89 | 81,606 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 135,608 |
| Solar System Trivia | 0 | - | 4.93 | 45,941 |
| Body Part Cliches | 0 | - | 4.43 | 122,893 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,011 |
| Songs that Start with the Same Word | 0 | - | 4.87 | 109,844 |
| Word Scramble - Countries | 0 | - | 4.86 | 2,086,810 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 162,925 |
| Solve the Secret Country #2 | 0 | - | 4.85 | 115,930 |
| Anagram Chain - Countries | 0 | - | 4.99 | 115,123 |
| 7 Deadly Sins | 0 | - | 4.88 | 394,446 |
| Geography Quiz for Dummies | 0 | - | 4.87 | 107,708 |
| Disney Animated Characters | 0 | - | 4.88 | 598,865 |
| Conspiracy Theories – Mostly U.S. | 0 | - | 4.44 | 56,213 |
| MLB Baseball Groups of Things | 0 | - | 4.06 | 18,463 |
| Literary Groups of Things | 0 | - | 4.26 | 30,525 |
| Top Five Languages by Language Family | 0 | - | 4.99 | 53,301 |
| Countries with Four Letters | 0 | - | 4.99 | 418,209 |
| 4-Letter Geography Chain #1 | 0 | - | 4.82 | 169,107 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,494 |
| Eight Most Popular Berries | 0 | - | 4.43 | 98,487 |
| Top 20 Fruits Sold in the U.S. | 0 | - | 4.44 | 66,921 |
| Name a Valid World City | 0 | - | 4.83 | 70,032 |
| Countries but all Vowels are Changed to O | 0 | - | 4.92 | 67,686 |
| Solve the Secret Country #3 | 0 | - | 4.98 | 63,076 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,043 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 214,441 |
| Fruits: No Vowels | 0 | - | 4.81 | 98,425 |
| Countries of the World with an Empty Map - Hard Version | 0 | - | 5.00 | 302,549 |
| Islands by Country #1 | 0 | - | 4.87 | 174,420 |
| Regions of Countries #1 | 0 | - | 4.97 | 158,862 |
| Regions of Countries #2 | 0 | - | 4.95 | 123,231 |
| Regions of Countries #3 | 0 | - | 4.84 | 90,299 |
| Groups of Two - Movies | 0 | - | 3.97 | 23,318 |
| Country Chain | 0 | - | 4.96 | 215,609 |
| Can You Name These 50 Random Countries? | 0 | - | 4.98 | 213,576 |
| Cold War Decoder | 0 | - | 4.83 | 51,894 |
| Name a Valid Year in History | 0 | - | 4.93 | 66,296 |
| Name a Valid First-Level Subdivision for Every Country | 0 | - | 4.97 | 49,578 |
| Name a Valid Country #3 | 0 | - | 4.99 | 259,636 |
| Name a Valid Country #1 | 0 | - | 4.99 | 283,045 |
| Name a Valid Country #2 | 0 | - | 4.98 | 246,174 |
| Name a Valid Country #4 | 0 | - | 4.97 | 251,332 |
| Name a Valid Country #5 | 0 | - | 4.99 | 189,628 |
| Name a Valid Country #6 | 0 | - | 4.94 | 126,243 |
| Name a Valid Country #7 | 0 | - | 4.91 | 126,337 |
| Name a Valid Country #8 | 0 | - | 4.85 | 95,857 |
| Random Name a Valid Bordering Country | 0 | - | 4.99 | 74,132 |
| Name a Valid Country #10 | 0 | - | 4.93 | 41,322 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,228 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,009 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,219 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,334 |
| Science Multiple Choice #2 | 0 | - | 4.40 | 36,302 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 150,269 |
| Environmental Issues | 0 | - | 4.54 | 26,711 |
| Countries by Languages in 90 Seconds | 0 | - | 4.93 | 710,837 |
| Chuck Norris Facts | 0 | - | 4.50 | 8,011 |
| Two Letter Answers #2 | 0 | - | 4.43 | 85,991 |
| One Letter Answers #1 | 0 | - | 4.47 | 77,372 |
| Guess a Top 5 Last Name by Country | 0 | - | 4.64 | 45,068 |
| Shared First Names #2 | 0 | - | 4.53 | 44,958 |
| People with J Initials | 0 | - | 4.51 | 55,205 |
| History Analogies #1 | 0 | - | 4.53 | 89,754 |
| History Analogies #2 | 0 | - | 4.49 | 76,974 |
| History Analogies #3 | 0 | - | 4.61 | 80,410 |
| English Idioms #1 | 0 | - | 4.45 | 144,208 |
| Cliche Quotes Quiz #2 | 0 | - | 4.43 | 45,219 |
| Clothing Idioms | 0 | - | 4.41 | 34,047 |
| Are You a Nerd? | 0 | - | 4.35 | 44,476 |
| The Eleven Colors | 0 | - | 4.73 | 233,195 |
| King in the Answers | 0 | - | 4.42 | 49,583 |
| Super in the Answers | 0 | - | 4.52 | 109,275 |
| Four Letter Geography #1 | 0 | - | 4.69 | 89,068 |
| Five Letter Geography #3 | 0 | - | 4.61 | 130,720 |
| Six Letter Geography #1 | 0 | - | 4.42 | 114,290 |
| Six Letter Geography #2 | 0 | - | 4.69 | 67,383 |
| Six Letter Geography #3 | 0 | - | 4.53 | 81,408 |
| Seven Letter Geography #1 | 0 | - | 4.52 | 71,947 |
| Seven Letter Geography #3 | 0 | - | 4.50 | 37,636 |
| Eight Letter Geography #1 | 0 | - | 4.45 | 38,435 |
| Five Letter Geography #1 | 0 | - | 4.48 | 151,098 |
| Five Letter Geography #4 | 0 | - | 4.78 | 84,551 |
| Five Letter Geography - Hero Mode | 0 | - | 4.63 | 35,425 |
| Random History by Country | 0 | - | 4.53 | 34,638 |
| Geography Decoder | 0 | - | 4.53 | 75,320 |
| Continental Geography Decoder | 0 | - | 4.46 | 52,356 |
| Letter A Geography Chain | 0 | - | 4.53 | 67,301 |
| 6-Letter Movie Chain #3 | 0 | - | 4.43 | 36,057 |
| Fruit & Vegetable Varieties Quiz | 0 | - | 4.30 | 58,089 |
| Fruits by Picture | 0 | - | 4.20 | 804,406 |
| Plants as Key Ingredient | 0 | - | 4.40 | 46,133 |
| Answers are Beverages | 0 | - | 4.10 | 61,021 |
| Basic Cake Ingredients | 0 | - | 4.22 | 109,718 |
| Types of Food | 0 | - | 4.24 | 89,091 |
| The Foods they Ate | 0 | - | 4.03 | 69,176 |
| Animals Used in Food | 0 | - | 4.29 | 77,599 |
| Most Popular Fruits | 0 | - | 4.16 | 96,170 |
| Healthiest Fruits and Vegetables | 0 | - | 4.04 | 46,628 |
| 10 Most Popular Pizza Toppings | 0 | - | 4.06 | 84,665 |
| Valid Answer - World History #1 | 0 | - | 4.56 | 61,510 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 316,692 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,573 |
| Obfuscations of Movie Titles #1 | 0 | - | 4.93 | 61,717 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.42 | 319,230 |
| U.S. Groups of Four Quiz | 0 | - | 4.39 | 25,177 |
| U.S. Groups of Three Quiz | 0 | - | 4.04 | 20,795 |
| The Only Country ... | 0 | - | 4.91 | 79,761 |
| 20 Random Countries on an Empty World Map | 0 | - | 4.98 | 122,308 |
| Random Countries by Borders | 0 | - | 4.99 | 81,604 |
| Top Five Countries by Random Categories | 0 | - | 4.95 | 136,077 |
| Random Name a Valid Country | 0 | - | 4.99 | 203,079 |
| Random Point on Land to Country | 0 | - | 4.98 | 231,610 |
| World Countries by 10 Category Elimination #1 | 0 | - | 4.97 | 121,313 |
| Category Elimination - Countries #2 | 0 | - | 4.98 | 233,343 |
| Category Elimination - Countries #3 | 0 | - | 4.99 | 222,627 |
| Category Elimination - Countries #4 | 0 | - | 4.99 | 190,150 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,682 |
| Name a Valid Island Country | 0 | - | 4.96 | 113,964 |
| Country Quiz on a Map - USA | 0 | - | 4.98 | 56,751 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,345 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,628 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,144 |
| Elements by Picture | 0 | - | 4.28 | 69,501 |
| Medical Acronyms | 0 | - | 4.43 | 95,776 |
| Medical Vocabulary | 0 | - | 4.54 | 58,479 |
