| Random Symbol to Element | 0 | - | 4.88 | 93,532 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,186 |
| International Scientific Units | 0 | - | 4.95 | 157,631 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 63,109 |
| Cold War Decoder | 0 | - | 4.83 | 52,501 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,100,420 |
| Science General Knowledge #1 | 0 | - | 4.54 | 166,972 |
| Science General Knowledge #2 | 0 | - | 4.48 | 119,450 |
| Science General Knowledge #3 | 0 | - | 4.56 | 109,352 |
| Word Chain - Science | 0 | - | 4.59 | 55,057 |
| Geography Decoder | 0 | - | 4.53 | 75,763 |
| Continental Geography Decoder | 0 | - | 4.46 | 52,764 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,253,140 |
| The Sun Quiz | 0 | - | 4.93 | 34,897 |
| First Names of Scientists | 0 | - | 4.51 | 57,099 |
| Groups of Two - Science | 0 | - | 4.26 | 48,409 |
| Elements by Symbol | 0 | - | 4.92 | 198,046 |
| Speed Symbol by Element | 0 | - | 4.90 | 105,192 |
| Answers are Elements #2 | 0 | - | 4.43 | 55,138 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 94,509 |
| Noble Gases | 0 | - | 4.89 | 78,577 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 64,864 |
| Periodic Table Symbols | 0 | - | 4.97 | 72,989 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 82,082 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 103,221 |
| Name a Valid Element | 0 | - | 4.67 | 70,255 |
| Name the Virus | 0 | - | 4.87 | 76,966 |
| Christmas Decoder | 0 | - | 4.42 | 49,615 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 80,935 |
| Famous Scientists | 0 | - | 4.57 | 42,767 |
| Citrus Fruits | 0 | - | 3.64 | 42,117 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 54,159 |
| Answers are Elements #1 | 0 | - | 4.29 | 52,912 |
| Elemental Words | 0 | - | 4.97 | 52,453 |
| Metals of Antiquity | 0 | - | 4.95 | 93,718 |
| Word Scramble - Body Parts | 0 | - | 4.38 | 176,857 |
| Three Letter Body Parts | 0 | - | 4.40 | 205,798 |
| One-Syllable Human Body Parts | 0 | - | 4.29 | 88,416 |
| Analogies of Countries #1 | 0 | - | 4.89 | 68,628 |
| Best-Selling Video Game Consoles | 0 | - | 4.82 | 276,605 |
| Halloween Decoder | 0 | - | 4.21 | 45,670 |
| Name a Valid Answer - Geography | 0 | - | 4.95 | 104,730 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,929 |
| Astronomy Decoder | 0 | - | 4.48 | 38,147 |
| Scientific Names | 0 | - | 4.32 | 78,627 |
| Animals - Taxonomy to Common Name | 0 | - | 4.81 | 28,383 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,640,554 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,830 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 32,059 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 189,384 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,694 |
| Astronomy Quiz | 0 | - | 4.90 | 82,995 |
| Largest Objects in the Solar System | 0 | - | 4.99 | 137,964 |
| Solar System Trivia | 0 | - | 4.93 | 46,947 |
| Body Part Cliches | 0 | - | 4.44 | 123,596 |
| Bones of the Human Body | 0 | - | 4.51 | 43,277 |
| Medical Conditions Quiz | 0 | - | 4.78 | 124,704 |
| Countries but all Vowels are Changed to O | 0 | - | 4.91 | 70,347 |
| Italian Name Translation | 0 | - | 4.83 | 47,542 |
| Songs that Start with the Same Word | 0 | - | 4.87 | 111,231 |
| Word Scramble - Countries | 0 | - | 4.87 | 2,108,451 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 167,006 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 119,465 |
| Anagram Chain - Countries | 0 | - | 4.98 | 117,095 |
| 7 Deadly Sins | 0 | - | 4.88 | 402,288 |
| Geography Quiz for Dummies | 0 | - | 4.87 | 109,069 |
| Disney Animated Characters | 0 | - | 4.88 | 602,286 |
| Conspiracy Theories – Mostly U.S. | 0 | - | 4.44 | 56,636 |
| Geographic Groups of Two #1 | 0 | - | 4.99 | 237,646 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 452,250 |
| Countries with Four Letters | 0 | - | 4.99 | 424,322 |
| 4-Letter Geography Chain #1 | 0 | - | 4.82 | 170,438 |
| Animal Decoder | 0 | - | 4.06 | 15,569 |
| Eight Most Popular Berries | 0 | - | 4.43 | 99,706 |
| Top 20 Fruits Sold in the U.S. | 0 | - | 4.45 | 68,116 |
| Name a Valid World City | 0 | - | 4.84 | 71,647 |
| Solve the Secret Country #3 | 0 | - | 4.98 | 65,232 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,138 |
| Songs with Body Parts in the Title | 0 | - | 4.32 | 216,147 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,460 |
| Random Geographic Groups of Seven | 0 | - | 4.91 | 46,501 |
| Fruits: No Vowels | 0 | - | 4.81 | 100,149 |
| European History for Dummies | 0 | - | 4.83 | 90,188 |
| Countries of the World with an Empty Map - Hard Version | 0 | - | 5.00 | 305,964 |
| Islands by Country #1 | 0 | - | 4.90 | 175,747 |
| Regions of Countries #1 | 0 | - | 4.96 | 159,902 |
| Regions of Countries #2 | 0 | - | 4.95 | 124,266 |
| Regions of Countries #3 | 0 | - | 4.85 | 90,994 |
| Random Geographic Groups of Five | 0 | - | 4.93 | 115,077 |
| Top Five Countries By Category #2 | 0 | - | 4.93 | 201,449 |
| Top Five Countries By Category #3 | 0 | - | 4.83 | 183,830 |
| Country Chain | 0 | - | 4.96 | 217,881 |
| Can You Name These 50 Random Countries? | 0 | - | 4.98 | 217,954 |
| Name a Valid Year in History | 0 | - | 4.93 | 67,649 |
| Name a Valid First-Level Subdivision for Every Country | 0 | - | 4.97 | 50,247 |
| Name a Valid Country #3 | 0 | - | 4.99 | 264,154 |
| Name a Valid Country #1 | 0 | - | 4.99 | 292,349 |
| Name a Valid Country #2 | 0 | - | 4.98 | 252,109 |
| Name a Valid Country #4 | 0 | - | 4.97 | 257,222 |
| Name a Valid Country #5 | 0 | - | 4.99 | 208,205 |
| Name a Valid Country #6 | 0 | - | 4.94 | 130,374 |
| Name a Valid Country #7 | 0 | - | 4.91 | 130,135 |
| Name a Valid Country #8 | 0 | - | 4.86 | 99,453 |
| Random Name a Valid Bordering Country | 0 | - | 4.99 | 76,106 |
| Name a Valid Country #10 | 0 | - | 4.93 | 43,484 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,395 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,849 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,849 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,700 |
| Science Multiple Choice #3 | 0 | - | 4.39 | 34,756 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 152,249 |
| Environmental Issues | 0 | - | 4.54 | 26,881 |
| Two Letter Answers #2 | 0 | - | 4.43 | 86,618 |
| One Letter Answers #1 | 0 | - | 4.47 | 77,599 |
| People With Place Names | 0 | - | 4.01 | 39,773 |
| Guess a Top 5 Last Name by Country | 0 | - | 4.61 | 46,125 |
| "Son" Last Names | 0 | - | 4.47 | 42,573 |
| Shared First Names #2 | 0 | - | 4.53 | 45,729 |
| People with J Initials | 0 | - | 4.51 | 55,532 |
| History Analogies #1 | 0 | - | 4.53 | 90,117 |
| History Analogies #2 | 0 | - | 4.49 | 77,358 |
| History Analogies #3 | 0 | - | 4.61 | 80,803 |
| English Idioms #1 | 0 | - | 4.45 | 146,204 |
| Cliche Quotes Quiz #2 | 0 | - | 4.42 | 45,471 |
| Clothing Idioms | 0 | - | 4.41 | 34,277 |
| People - Real or Fictional? | 0 | - | 4.56 | 59,001 |
| Places - Real or Fictional? | 0 | - | 4.59 | 49,685 |
| Are You a Nerd? | 0 | - | 4.35 | 45,041 |
| The Eleven Colors | 0 | - | 4.74 | 235,654 |
| Groups of Things - History #1 | 0 | - | 4.41 | 94,337 |
| King in the Answers | 0 | - | 4.42 | 50,282 |
| Super in the Answers | 0 | - | 4.52 | 110,596 |
| Four Letter Geography #1 | 0 | - | 4.69 | 89,573 |
| Five Letter Geography #3 | 0 | - | 4.61 | 131,728 |
| Six Letter Geography #1 | 0 | - | 4.42 | 114,787 |
| Six Letter Geography #2 | 0 | - | 4.68 | 67,765 |
| Six Letter Geography #3 | 0 | - | 4.52 | 81,837 |
| Seven Letter Geography #1 | 0 | - | 4.52 | 72,732 |
| Seven Letter Geography #3 | 0 | - | 4.50 | 38,282 |
| Eight Letter Geography #1 | 0 | - | 4.45 | 38,610 |
| Five Letter Geography #1 | 0 | - | 4.48 | 151,828 |
| Five Letter Geography #4 | 0 | - | 4.78 | 85,120 |
| Five Letter Geography - Hero Mode | 0 | - | 4.63 | 35,637 |
| Random History by Country | 0 | - | 4.53 | 34,950 |
| Letter A Geography Chain | 0 | - | 4.54 | 67,677 |
| 6-Letter Movie Chain #3 | 0 | - | 4.43 | 36,388 |
| Fruit & Vegetable Varieties Quiz | 0 | - | 4.30 | 58,559 |
| Fruits by Picture | 0 | - | 4.19 | 808,462 |
| Plants as Key Ingredient | 0 | - | 4.40 | 46,533 |
| Answers are Beverages | 0 | - | 4.06 | 61,482 |
| Basic Cake Ingredients | 0 | - | 4.23 | 110,593 |
| Types of Food | 0 | - | 4.25 | 90,182 |
| The Foods they Ate | 0 | - | 4.03 | 69,531 |
| Animals Used in Food | 0 | - | 4.28 | 78,312 |
| Most Popular Fruits | 0 | - | 4.16 | 96,834 |
| Healthiest Fruits and Vegetables | 0 | - | 4.02 | 46,867 |
| 10 Most Popular Pizza Toppings | 0 | - | 4.06 | 85,471 |
| Valid Answer - World History #1 | 0 | - | 4.56 | 62,037 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 322,446 |
| Countries by Languages in 90 Seconds | 0 | - | 4.93 | 735,269 |
| Chuck Norris Facts | 0 | - | 4.52 | 8,592 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 36,083 |
| Country Quiz on a Map - USA | 0 | - | 4.98 | 58,227 |
| Movie Title Antonyms #1 | 0 | - | 4.81 | 196,535 |
| Obfuscations of Movie Titles #1 | 0 | - | 4.93 | 62,189 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.43 | 323,651 |
| Five Biggest Immigrant Groups by Country #1 | 0 | - | 4.97 | 181,399 |
| Five Biggest Immigrant Groups by Country #2 | 0 | - | 4.91 | 89,488 |
| Top Five Countries By Fruit Production | 0 | - | 4.96 | 80,613 |
| The Only Country ... | 0 | - | 4.91 | 81,598 |
| 20 Random Countries on an Empty World Map | 0 | - | 4.98 | 124,889 |
| Random Countries by Borders | 0 | - | 4.99 | 82,810 |
| Top Five Countries by Random Categories | 0 | - | 4.95 | 140,615 |
| Random Name a Valid Country | 0 | - | 4.99 | 205,765 |
| Random Point on Land to Country | 0 | - | 4.99 | 236,360 |
| Random Countries on a Topological Map | 0 | - | 4.91 | 52,560 |
| Valentine's Day Decoder | 0 | - | 3.92 | 15,887 |
| Canada Decoder | 0 | - | 4.07 | 18,748 |
| World Countries by 10 Category Elimination #1 | 0 | - | 4.97 | 123,416 |
| Category Elimination - Countries #2 | 0 | - | 4.98 | 237,205 |
| Category Elimination - Countries #3 | 0 | - | 4.99 | 226,258 |
| Category Elimination - Countries #4 | 0 | - | 4.99 | 192,991 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,582 |
| Name a Valid Island Country | 0 | - | 4.96 | 115,289 |
| Science Vocabulary #1 | 0 | - | 4.34 | 72,061 |
| Science Vocabulary #3 | 0 | - | 4.31 | 52,132 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,422 |
| Science True or False | 0 | - | 4.35 | 40,432 |
| Elements by Picture | 0 | - | 4.27 | 70,162 |
| Medical Acronyms | 0 | - | 4.43 | 97,096 |
| Medical Vocabulary | 0 | - | 4.54 | 59,339 |
| History General Knowledge #13 | 0 | - | 4.69 | 49,797 |
| Two Letter Answers #4 | 0 | - | 4.27 | 89,059 |
| Two Letter Answers #1 | 0 | - | 4.31 | 108,955 |
| Three Letter Answers #2 | 0 | - | 4.09 | 71,820 |
| Two Letter Answers #3 | 0 | - | 4.13 | 82,795 |
| Three Letter Answers #1 | 0 | - | 4.32 | 74,128 |
| Historical Middle Names | 0 | - | 4.16 | 35,991 |
| People with Food Names | 0 | - | 4.10 | 61,265 |
| First Names of Historical Figures #2 | 0 | - | 4.32 | 40,841 |
