| Groups of Two - Science | 0 | - | 4.26 | 48,126 |
| Random Symbol to Element | 0 | - | 4.88 | 92,144 |
| Geographic Groups of Two #1 | 0 | - | 4.99 | 235,724 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 446,560 |
| International Scientific Units | 0 | - | 4.95 | 155,133 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,072 |
| Random Geographic Groups of Five | 0 | - | 4.93 | 113,571 |
| Top Five Countries By Category #2 | 0 | - | 4.93 | 198,212 |
| Top Five Countries By Category #3 | 0 | - | 4.82 | 169,330 |
| Random Geographic Groups of Seven | 0 | - | 4.91 | 45,147 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,090,129 |
| Science General Knowledge #1 | 0 | - | 4.54 | 163,347 |
| Science General Knowledge #2 | 0 | - | 4.47 | 116,562 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,130 |
| Word Chain - Science | 0 | - | 4.59 | 54,367 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,218,416 |
| Five Biggest Immigrant Groups by Country #1 | 0 | - | 4.97 | 179,356 |
| Five Biggest Immigrant Groups by Country #2 | 0 | - | 4.91 | 88,400 |
| Top Five Countries By Fruit Production | 0 | - | 4.96 | 77,040 |
| First Names of Scientists | 0 | - | 4.50 | 56,436 |
| Science Decoder | 0 | - | 4.52 | 28,640 |
| Elements by Symbol | 0 | - | 4.92 | 195,312 |
| Speed Symbol by Element | 0 | - | 4.91 | 103,489 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,814 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,369 |
| Noble Gases | 0 | - | 4.89 | 77,352 |
| Elements that are Gases at Room Temperature | 0 | - | 4.85 | 63,982 |
| Periodic Table Symbols | 0 | - | 4.97 | 70,788 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 80,775 |
| Periodic Table Elements A-Z | 0 | - | 4.78 | 102,143 |
| Name a Valid Element | 0 | - | 4.64 | 69,529 |
| Name the Virus | 0 | - | 4.86 | 76,185 |
| Groups of Things - Sports | 0 | - | 4.27 | 67,475 |
| Groups of Things - History #1 | 0 | - | 4.40 | 93,659 |
| Groups of Things - History #2 | 0 | - | 4.39 | 79,042 |
| History Groups of Two | 0 | - | 4.34 | 40,526 |
| Geographic Groups of Four #1 | 0 | - | 4.70 | 175,459 |
| Geographic Groups of Five #1 | 0 | - | 4.48 | 120,124 |
| Geographic Groups of Seven #1 | 0 | - | 4.63 | 140,558 |
| Geographic Groups of Two #2 | 0 | - | 4.67 | 114,543 |
| Geographic Groups of Six #2 | 0 | - | 4.53 | 52,881 |
| Geographic Groups of Two #3 | 0 | - | 4.46 | 83,509 |
| Geographic Groups of Four #2 | 0 | - | 4.75 | 80,121 |
| Geographic Groups of Five #2 | 0 | - | 4.73 | 63,398 |
| Geographic Groups of Three #2 | 0 | - | 4.55 | 69,284 |
| Geographic Groups of Two #4 | 0 | - | 4.44 | 77,829 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 79,734 |
| Famous Scientists | 0 | - | 4.57 | 42,408 |
| Citrus Fruits | 0 | - | 3.65 | 41,942 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,545 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,687 |
| Elemental Words | 0 | - | 4.96 | 51,940 |
| Metals of Antiquity | 0 | - | 4.94 | 92,842 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 175,724 |
| Three Letter Body Parts | 0 | - | 4.39 | 204,806 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 87,633 |
| Analogies of Countries #1 | 0 | - | 4.88 | 68,140 |
| Best-Selling Video Game Consoles | 0 | - | 4.81 | 269,266 |
| Musical Groups of Things | 0 | - | 4.37 | 31,047 |
| Geographic Groups of Three #1 | 0 | - | 4.35 | 96,522 |
| Geographic Groups of Six #1 | 0 | - | 4.27 | 92,649 |
| Geographic Groups of Eight | 0 | - | 4.38 | 58,624 |
| Geographic Groups of Seven #2 | 0 | - | 4.04 | 35,214 |
| Name a Valid Answer - Geography | 0 | - | 4.95 | 103,417 |
| Category Elimination - Elements | 0 | - | 4.62 | 53,188 |
| Astronomy Decoder | 0 | - | 4.50 | 37,821 |
| Five Biggest Immigrant Groups by Country #3 | 0 | - | 4.70 | 65,854 |
| Scientific Names | 0 | - | 4.32 | 78,111 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,585,145 |
| Random Geographic Groups of Six | 0 | - | 4.40 | 49,389 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 85,995 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,895 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.72 | 187,166 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,161 |
| Astronomy Quiz | 0 | - | 4.89 | 81,612 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 135,617 |
| Solar System Trivia | 0 | - | 4.93 | 45,950 |
| Body Part Cliches | 0 | - | 4.43 | 122,915 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,020 |
| Songs that Start with the Same Word | 0 | - | 4.87 | 109,852 |
| Word Scramble - Countries | 0 | - | 4.86 | 2,086,946 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 162,967 |
| Solve the Secret Country #2 | 0 | - | 4.85 | 115,951 |
| Anagram Chain - Countries | 0 | - | 4.99 | 115,143 |
| 7 Deadly Sins | 0 | - | 4.88 | 394,487 |
| Geography Quiz for Dummies | 0 | - | 4.87 | 107,718 |
| Disney Animated Characters | 0 | - | 4.88 | 598,878 |
| Conspiracy Theories – Mostly U.S. | 0 | - | 4.44 | 56,216 |
| MLB Baseball Groups of Things | 0 | - | 4.06 | 18,463 |
| Literary Groups of Things | 0 | - | 4.26 | 30,526 |
| Top Five Languages by Language Family | 0 | - | 4.99 | 53,306 |
| Countries with Four Letters | 0 | - | 4.99 | 418,241 |
| 4-Letter Geography Chain #1 | 0 | - | 4.82 | 169,112 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,499 |
| Eight Most Popular Berries | 0 | - | 4.43 | 98,494 |
| Top 20 Fruits Sold in the U.S. | 0 | - | 4.44 | 66,928 |
| Name a Valid World City | 0 | - | 4.83 | 70,041 |
| Countries but all Vowels are Changed to O | 0 | - | 4.92 | 67,704 |
| Solve the Secret Country #3 | 0 | - | 4.98 | 63,087 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,044 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 214,454 |
| Fruits: No Vowels | 0 | - | 4.81 | 98,433 |
| Countries of the World with an Empty Map - Hard Version | 0 | - | 5.00 | 302,561 |
| Islands by Country #1 | 0 | - | 4.87 | 174,426 |
| Regions of Countries #1 | 0 | - | 4.97 | 158,870 |
| Regions of Countries #2 | 0 | - | 4.95 | 123,236 |
| Regions of Countries #3 | 0 | - | 4.84 | 90,306 |
| Groups of Two - Movies | 0 | - | 3.97 | 23,320 |
| Country Chain | 0 | - | 4.96 | 215,617 |
| Can You Name These 50 Random Countries? | 0 | - | 4.98 | 213,597 |
| Cold War Decoder | 0 | - | 4.83 | 51,896 |
| Name a Valid Year in History | 0 | - | 4.93 | 66,308 |
| Name a Valid First-Level Subdivision for Every Country | 0 | - | 4.97 | 49,581 |
| Name a Valid Country #3 | 0 | - | 4.99 | 259,652 |
| Name a Valid Country #1 | 0 | - | 4.99 | 283,093 |
| Name a Valid Country #2 | 0 | - | 4.98 | 246,195 |
| Name a Valid Country #4 | 0 | - | 4.97 | 251,358 |
| Name a Valid Country #5 | 0 | - | 4.99 | 189,650 |
| Name a Valid Country #6 | 0 | - | 4.94 | 126,259 |
| Name a Valid Country #7 | 0 | - | 4.91 | 126,348 |
| Name a Valid Country #8 | 0 | - | 4.85 | 95,873 |
| Random Name a Valid Bordering Country | 0 | - | 4.99 | 74,138 |
| Name a Valid Country #10 | 0 | - | 4.93 | 41,328 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,228 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,017 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,222 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,334 |
| Science Multiple Choice #2 | 0 | - | 4.40 | 36,303 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 150,323 |
| Environmental Issues | 0 | - | 4.54 | 26,714 |
| Countries by Languages in 90 Seconds | 0 | - | 4.93 | 710,903 |
| Chuck Norris Facts | 0 | - | 4.50 | 8,018 |
| Two Letter Answers #2 | 0 | - | 4.43 | 85,994 |
| One Letter Answers #1 | 0 | - | 4.47 | 77,373 |
| Guess a Top 5 Last Name by Country | 0 | - | 4.64 | 45,070 |
| Shared First Names #2 | 0 | - | 4.53 | 44,961 |
| People with J Initials | 0 | - | 4.51 | 55,206 |
| History Analogies #1 | 0 | - | 4.53 | 89,758 |
| History Analogies #2 | 0 | - | 4.49 | 76,975 |
| History Analogies #3 | 0 | - | 4.61 | 80,412 |
| English Idioms #1 | 0 | - | 4.45 | 144,212 |
| Cliche Quotes Quiz #2 | 0 | - | 4.43 | 45,220 |
| Clothing Idioms | 0 | - | 4.41 | 34,047 |
| Are You a Nerd? | 0 | - | 4.35 | 44,478 |
| The Eleven Colors | 0 | - | 4.73 | 233,209 |
| King in the Answers | 0 | - | 4.42 | 49,587 |
| Super in the Answers | 0 | - | 4.52 | 109,287 |
| Four Letter Geography #1 | 0 | - | 4.69 | 89,068 |
| Five Letter Geography #3 | 0 | - | 4.61 | 130,727 |
| Six Letter Geography #1 | 0 | - | 4.42 | 114,293 |
| Six Letter Geography #2 | 0 | - | 4.69 | 67,386 |
| Six Letter Geography #3 | 0 | - | 4.53 | 81,410 |
| Seven Letter Geography #1 | 0 | - | 4.52 | 71,949 |
| Seven Letter Geography #3 | 0 | - | 4.50 | 37,645 |
| Eight Letter Geography #1 | 0 | - | 4.45 | 38,436 |
| Five Letter Geography #1 | 0 | - | 4.48 | 151,101 |
| Five Letter Geography #4 | 0 | - | 4.78 | 84,556 |
| Five Letter Geography - Hero Mode | 0 | - | 4.63 | 35,427 |
| Random History by Country | 0 | - | 4.53 | 34,642 |
| Geography Decoder | 0 | - | 4.53 | 75,323 |
| Continental Geography Decoder | 0 | - | 4.46 | 52,359 |
| Letter A Geography Chain | 0 | - | 4.53 | 67,302 |
| 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 | 804,424 |
| Plants as Key Ingredient | 0 | - | 4.40 | 46,138 |
| Answers are Beverages | 0 | - | 4.10 | 61,024 |
| Basic Cake Ingredients | 0 | - | 4.22 | 109,724 |
| Types of Food | 0 | - | 4.24 | 89,096 |
| The Foods they Ate | 0 | - | 4.03 | 69,178 |
| Animals Used in Food | 0 | - | 4.29 | 77,603 |
| Most Popular Fruits | 0 | - | 4.16 | 96,175 |
| Healthiest Fruits and Vegetables | 0 | - | 4.04 | 46,629 |
| 10 Most Popular Pizza Toppings | 0 | - | 4.06 | 84,668 |
| Valid Answer - World History #1 | 0 | - | 4.56 | 61,513 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 316,723 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,573 |
| Obfuscations of Movie Titles #1 | 0 | - | 4.93 | 61,720 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.42 | 319,236 |
| 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 | 79,776 |
| 20 Random Countries on an Empty World Map | 0 | - | 4.98 | 122,322 |
| Random Countries by Borders | 0 | - | 4.99 | 81,608 |
| Top Five Countries by Random Categories | 0 | - | 4.95 | 136,188 |
| Random Name a Valid Country | 0 | - | 4.99 | 203,099 |
| Random Point on Land to Country | 0 | - | 4.98 | 231,637 |
| World Countries by 10 Category Elimination #1 | 0 | - | 4.97 | 121,323 |
| Category Elimination - Countries #2 | 0 | - | 4.98 | 233,360 |
| Category Elimination - Countries #3 | 0 | - | 4.99 | 222,644 |
| Category Elimination - Countries #4 | 0 | - | 4.99 | 190,165 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,692 |
| Name a Valid Island Country | 0 | - | 4.96 | 113,972 |
| Country Quiz on a Map - USA | 0 | - | 4.98 | 56,756 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,348 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,629 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,145 |
| Elements by Picture | 0 | - | 4.28 | 69,507 |
| Medical Acronyms | 0 | - | 4.43 | 95,836 |
| Medical Vocabulary | 0 | - | 4.54 | 58,481 |
