| Groups of Two - Science | 0 | - | 4.26 | 48,155 |
| Random Symbol to Element | 0 | - | 4.88 | 92,303 |
| Geographic Groups of Two #1 | 0 | - | 4.99 | 235,936 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 447,033 |
| International Scientific Units | 0 | - | 4.95 | 155,506 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,291 |
| Random Geographic Groups of Five | 0 | - | 4.93 | 113,714 |
| Top Five Countries By Category #2 | 0 | - | 4.93 | 198,437 |
| Top Five Countries By Category #3 | 0 | - | 4.82 | 169,559 |
| Random Geographic Groups of Seven | 0 | - | 4.91 | 45,295 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,091,382 |
| Science General Knowledge #1 | 0 | - | 4.54 | 163,676 |
| Science General Knowledge #2 | 0 | - | 4.48 | 116,959 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,329 |
| Word Chain - Science | 0 | - | 4.59 | 54,434 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,222,660 |
| Five Biggest Immigrant Groups by Country #1 | 0 | - | 4.97 | 179,533 |
| Five Biggest Immigrant Groups by Country #2 | 0 | - | 4.91 | 88,501 |
| Top Five Countries By Fruit Production | 0 | - | 4.96 | 77,435 |
| First Names of Scientists | 0 | - | 4.50 | 56,499 |
| Science Decoder | 0 | - | 4.52 | 28,658 |
| Elements by Symbol | 0 | - | 4.92 | 195,693 |
| Speed Symbol by Element | 0 | - | 4.91 | 103,742 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,843 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,518 |
| Noble Gases | 0 | - | 4.89 | 77,517 |
| Elements that are Gases at Room Temperature | 0 | - | 4.85 | 64,109 |
| Periodic Table Symbols | 0 | - | 4.97 | 71,060 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 80,971 |
| Periodic Table Elements A-Z | 0 | - | 4.78 | 102,264 |
| Name a Valid Element | 0 | - | 4.64 | 69,618 |
| Name the Virus | 0 | - | 4.86 | 76,299 |
| Groups of Things - Sports | 0 | - | 4.27 | 67,531 |
| Groups of Things - History #1 | 0 | - | 4.40 | 93,733 |
| Groups of Things - History #2 | 0 | - | 4.39 | 79,099 |
| History Groups of Two | 0 | - | 4.34 | 40,556 |
| Geographic Groups of Four #1 | 0 | - | 4.70 | 175,544 |
| Geographic Groups of Five #1 | 0 | - | 4.48 | 120,167 |
| Geographic Groups of Seven #1 | 0 | - | 4.63 | 140,640 |
| Geographic Groups of Two #2 | 0 | - | 4.67 | 114,622 |
| Geographic Groups of Six #2 | 0 | - | 4.53 | 52,924 |
| Geographic Groups of Two #3 | 0 | - | 4.46 | 83,587 |
| Geographic Groups of Four #2 | 0 | - | 4.75 | 80,215 |
| Geographic Groups of Five #2 | 0 | - | 4.73 | 63,472 |
| Geographic Groups of Three #2 | 0 | - | 4.55 | 69,373 |
| Geographic Groups of Two #4 | 0 | - | 4.44 | 77,900 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 79,896 |
| Famous Scientists | 0 | - | 4.57 | 42,478 |
| Citrus Fruits | 0 | - | 3.65 | 41,964 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,632 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,712 |
| Elemental Words | 0 | - | 4.96 | 52,022 |
| Metals of Antiquity | 0 | - | 4.94 | 92,961 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 175,865 |
| Three Letter Body Parts | 0 | - | 4.40 | 204,970 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 87,770 |
| Analogies of Countries #1 | 0 | - | 4.88 | 68,179 |
| Best-Selling Video Game Consoles | 0 | - | 4.81 | 270,209 |
| Musical Groups of Things | 0 | - | 4.37 | 31,076 |
| Geographic Groups of Three #1 | 0 | - | 4.35 | 96,556 |
| Geographic Groups of Six #1 | 0 | - | 4.27 | 92,667 |
| Geographic Groups of Eight | 0 | - | 4.38 | 58,647 |
| Geographic Groups of Seven #2 | 0 | - | 4.04 | 35,241 |
| Name a Valid Answer - Geography | 0 | - | 4.95 | 103,585 |
| Category Elimination - Elements | 0 | - | 4.62 | 53,275 |
| Astronomy Decoder | 0 | - | 4.50 | 37,867 |
| Five Biggest Immigrant Groups by Country #3 | 0 | - | 4.70 | 65,915 |
| Scientific Names | 0 | - | 4.32 | 78,199 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,590,883 |
| Random Geographic Groups of Six | 0 | - | 4.40 | 49,472 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,086 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,921 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.72 | 187,447 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,223 |
| Astronomy Quiz | 0 | - | 4.90 | 81,812 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 135,884 |
| Solar System Trivia | 0 | - | 4.93 | 46,105 |
| Body Part Cliches | 0 | - | 4.43 | 123,105 |
| Bones of the Human Body | 0 | - | 4.54 | 39,725 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,181 |
| Italian Name Translation | 0 | - | 4.81 | 45,196 |
| Songs that Start with the Same Word | 0 | - | 4.87 | 110,030 |
| Word Scramble - Countries | 0 | - | 4.86 | 2,089,203 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 163,406 |
| Solve the Secret Country #2 | 0 | - | 4.85 | 116,301 |
| Anagram Chain - Countries | 0 | - | 4.99 | 115,354 |
| 7 Deadly Sins | 0 | - | 4.88 | 395,499 |
| Geography Quiz for Dummies | 0 | - | 4.87 | 107,892 |
| Disney Animated Characters | 0 | - | 4.88 | 599,451 |
| Conspiracy Theories – Mostly U.S. | 0 | - | 4.44 | 56,276 |
| MLB Baseball Groups of Things | 0 | - | 4.08 | 18,485 |
| Literary Groups of Things | 0 | - | 4.26 | 30,547 |
| Top Five Languages by Language Family | 0 | - | 4.99 | 53,428 |
| Countries with Four Letters | 0 | - | 4.99 | 418,857 |
| 4-Letter Geography Chain #1 | 0 | - | 4.82 | 169,280 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,571 |
| Eight Most Popular Berries | 0 | - | 4.43 | 98,707 |
| Top 20 Fruits Sold in the U.S. | 0 | - | 4.44 | 67,070 |
| Name a Valid World City | 0 | - | 4.83 | 70,232 |
| Countries but all Vowels are Changed to O | 0 | - | 4.92 | 68,008 |
| Solve the Secret Country #3 | 0 | - | 4.98 | 63,330 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,069 |
| Songs with Body Parts in the Title | 0 | - | 4.31 | 214,972 |
| Fruits: No Vowels | 0 | - | 4.81 | 98,670 |
| Countries of the World with an Empty Map - Hard Version | 0 | - | 5.00 | 302,900 |
| Islands by Country #1 | 0 | - | 4.87 | 174,556 |
| Regions of Countries #1 | 0 | - | 4.97 | 158,977 |
| Regions of Countries #2 | 0 | - | 4.95 | 123,323 |
| Regions of Countries #3 | 0 | - | 4.84 | 90,373 |
| Groups of Two - Movies | 0 | - | 3.97 | 23,340 |
| Country Chain | 0 | - | 4.96 | 215,859 |
| Can You Name These 50 Random Countries? | 0 | - | 4.98 | 214,049 |
| Cold War Decoder | 0 | - | 4.83 | 51,973 |
| Name a Valid Year in History | 0 | - | 4.93 | 66,482 |
| Name a Valid First-Level Subdivision for Every Country | 0 | - | 4.97 | 49,633 |
| Name a Valid Country #3 | 0 | - | 4.99 | 260,004 |
| Name a Valid Country #1 | 0 | - | 4.99 | 283,956 |
| Name a Valid Country #2 | 0 | - | 4.98 | 246,626 |
| Name a Valid Country #4 | 0 | - | 4.97 | 251,805 |
| Name a Valid Country #5 | 0 | - | 4.99 | 189,976 |
| Name a Valid Country #6 | 0 | - | 4.95 | 126,555 |
| Name a Valid Country #7 | 0 | - | 4.91 | 126,634 |
| Name a Valid Country #8 | 0 | - | 4.85 | 96,170 |
| Random Name a Valid Bordering Country | 0 | - | 4.99 | 74,340 |
| Name a Valid Country #10 | 0 | - | 4.93 | 41,544 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,252 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,141 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,294 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,388 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,363 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 150,868 |
| Environmental Issues | 0 | - | 4.54 | 26,735 |
| Countries by Languages in 90 Seconds | 0 | - | 4.93 | 712,299 |
| Chuck Norris Facts | 0 | - | 4.50 | 8,091 |
| Two Letter Answers #2 | 0 | - | 4.43 | 86,062 |
| One Letter Answers #1 | 0 | - | 4.47 | 77,395 |
| Guess a Top 5 Last Name by Country | 0 | - | 4.64 | 45,163 |
| Shared First Names #2 | 0 | - | 4.53 | 45,011 |
| People with J Initials | 0 | - | 4.51 | 55,234 |
| History Analogies #1 | 0 | - | 4.53 | 89,796 |
| History Analogies #2 | 0 | - | 4.49 | 77,017 |
| History Analogies #3 | 0 | - | 4.61 | 80,454 |
| English Idioms #1 | 0 | - | 4.45 | 144,896 |
| Cliche Quotes Quiz #2 | 0 | - | 4.43 | 45,255 |
| Clothing Idioms | 0 | - | 4.41 | 34,074 |
| Are You a Nerd? | 0 | - | 4.35 | 44,543 |
| The Eleven Colors | 0 | - | 4.73 | 233,417 |
| King in the Answers | 0 | - | 4.42 | 49,670 |
| Super in the Answers | 0 | - | 4.52 | 109,432 |
| Four Letter Geography #1 | 0 | - | 4.69 | 89,125 |
| Five Letter Geography #3 | 0 | - | 4.61 | 130,838 |
| Six Letter Geography #1 | 0 | - | 4.42 | 114,352 |
| Six Letter Geography #2 | 0 | - | 4.69 | 67,436 |
| Six Letter Geography #3 | 0 | - | 4.52 | 81,460 |
| Seven Letter Geography #1 | 0 | - | 4.52 | 72,041 |
| Seven Letter Geography #3 | 0 | - | 4.50 | 37,708 |
| Eight Letter Geography #1 | 0 | - | 4.45 | 38,457 |
| Five Letter Geography #1 | 0 | - | 4.48 | 151,170 |
| Five Letter Geography #4 | 0 | - | 4.78 | 84,619 |
| Five Letter Geography - Hero Mode | 0 | - | 4.63 | 35,447 |
| Random History by Country | 0 | - | 4.53 | 34,676 |
| Geography Decoder | 0 | - | 4.53 | 75,369 |
| Continental Geography Decoder | 0 | - | 4.46 | 52,410 |
| Letter A Geography Chain | 0 | - | 4.53 | 67,351 |
| 6-Letter Movie Chain #3 | 0 | - | 4.43 | 36,092 |
| Fruit & Vegetable Varieties Quiz | 0 | - | 4.30 | 58,153 |
| Fruits by Picture | 0 | - | 4.20 | 804,900 |
| Plants as Key Ingredient | 0 | - | 4.40 | 46,198 |
| Answers are Beverages | 0 | - | 4.10 | 61,098 |
| Basic Cake Ingredients | 0 | - | 4.22 | 109,828 |
| Types of Food | 0 | - | 4.24 | 89,187 |
| The Foods they Ate | 0 | - | 4.03 | 69,232 |
| Animals Used in Food | 0 | - | 4.29 | 77,697 |
| Most Popular Fruits | 0 | - | 4.16 | 96,264 |
| Healthiest Fruits and Vegetables | 0 | - | 4.04 | 46,654 |
| 10 Most Popular Pizza Toppings | 0 | - | 4.06 | 84,770 |
| Valid Answer - World History #1 | 0 | - | 4.56 | 61,586 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 317,318 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,681 |
| Obfuscations of Movie Titles #1 | 0 | - | 4.93 | 61,781 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.42 | 319,506 |
| U.S. Groups of Four Quiz | 0 | - | 4.39 | 25,207 |
| U.S. Groups of Three Quiz | 0 | - | 4.04 | 20,810 |
| The Only Country ... | 0 | - | 4.91 | 80,010 |
| 20 Random Countries on an Empty World Map | 0 | - | 4.98 | 122,708 |
| Random Countries by Borders | 0 | - | 4.99 | 81,728 |
| Top Five Countries by Random Categories | 0 | - | 4.95 | 137,325 |
| Random Name a Valid Country | 0 | - | 4.99 | 203,367 |
| Random Point on Land to Country | 0 | - | 4.99 | 232,103 |
| World Countries by 10 Category Elimination #1 | 0 | - | 4.97 | 121,569 |
| Category Elimination - Countries #2 | 0 | - | 4.98 | 233,777 |
| Category Elimination - Countries #3 | 0 | - | 4.99 | 223,017 |
| Category Elimination - Countries #4 | 0 | - | 4.99 | 190,511 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,910 |
| Name a Valid Island Country | 0 | - | 4.96 | 114,120 |
| Country Quiz on a Map - USA | 0 | - | 4.98 | 56,921 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,426 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,688 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,172 |
| Elements by Picture | 0 | - | 4.28 | 69,593 |
