| Metals of Antiquity | 0 | - | 4.94 | 93,137 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,231 |
| Former Countries by Territory Map | 0 | - | 4.96 | 102,141 |
| Empires by Maps | 0 | - | 4.98 | 119,309 |
| Animals by Skeleton Image | 0 | - | 4.80 | 46,187 |
| Merged Company Logos #1 | 0 | - | 4.91 | 105,829 |
| Planets By Picture Quiz | 0 | - | 4.49 | 56,471 |
| Islands by Shape #2 | 0 | - | 4.88 | 59,100 |
| Visual Memory Test - Random Cartoons | 0 | - | 4.98 | 103,381 |
| Play-Doh People from History | 0 | - | 4.99 | 94,285 |
| Famous Landmarks Out Of Focus #1 | 0 | - | 4.89 | 60,617 |
| Jeppy in Disguise #1 | 0 | - | 4.92 | 49,000 |
| Jeppy in Disguise #2 | 0 | - | 4.96 | 49,193 |
| Circular Cutouts from a World Map | 0 | - | 4.98 | 61,245 |
| All Country Flags of the World | 0 | - | 5.00 | 3,630,075 |
| Elements Named for Countries | 0 | - | 4.52 | 24,541 |
| Country Flags Quiz #1 | 0 | - | 4.98 | 2,531,204 |
| Country Flags Quiz #2 | 0 | - | 4.98 | 1,089,769 |
| Country Flags Quiz #3 | 0 | - | 4.98 | 731,435 |
| Years in History by Picture | 0 | - | 4.44 | 35,311 |
| Make a Stained Glass Window | 0 | - | 5.00 | 68,129 |
| Famous Foreheads #1 | 0 | - | 4.47 | 74,511 |
| Flags with Crescents | 0 | - | 4.98 | 168,439 |
| Country Flag Trivia | 0 | - | 4.81 | 56,402 |
| Country Flags with Eagles - Picture Quiz | 0 | - | 4.98 | 102,981 |
| Country Flags with the Union Jack | 0 | - | 4.87 | 76,916 |
| Pixelated Flag Quiz | 0 | - | 4.98 | 86,532 |
| Flag Emblems Scavenger Hunt | 0 | - | 5.00 | 66,834 |
| Flags by Horizontal Stripes #1 | 0 | - | 4.84 | 84,711 |
| Country Flags with the Sun - Picture Quiz | 0 | - | 4.83 | 52,380 |
| Real vs. Fake Flags | 0 | - | 4.98 | 123,268 |
| National Football Team Logos | 0 | - | 4.85 | 179,495 |
| Merged Company Logos #2 | 0 | - | 4.75 | 77,076 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,615 |
| Name that Object #1 | 0 | - | 3.56 | 96,358 |
| Flags to Languages | 0 | - | 4.95 | 173,012 |
| Similar Country Flags - Multiple Choice Quiz | 0 | - | 4.94 | 50,200 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,413 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,407 |
| Countries with the Most Forest | 0 | - | 4.87 | 146,878 |
| Countries with Glaciers | 0 | - | 4.97 | 104,851 |
| Fruits by Picture | 0 | - | 4.20 | 805,888 |
| Old Movies by Picture | 0 | - | 4.51 | 24,957 |
| Musical Instruments by Picture #2 | 0 | - | 4.24 | 46,829 |
| Geography by Picture - B | 0 | - | 4.42 | 55,499 |
| Geography by Picture - H | 0 | - | 4.50 | 58,116 |
| Geography by Picture - N | 0 | - | 4.45 | 42,114 |
| Geography by Picture - R | 0 | - | 4.56 | 40,935 |
| Geography by Picture - T | 0 | - | 4.54 | 57,751 |
| Random Logos Quiz | 0 | - | 4.31 | 207,652 |
| All North American Pro Sports Logos | 0 | - | 4.70 | 114,132 |
| Pictures by Letter - A | 0 | - | 4.17 | 33,258 |
| Pictures by Letter - J | 0 | - | 4.31 | 39,864 |
| Pictures by Letter - B | 0 | - | 4.31 | 43,752 |
| Pictures by Letter - D | 0 | - | 4.13 | 37,433 |
| Pictures by Letter - M | 0 | - | 4.24 | 37,654 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,207 |
| Three Real and One Fake - Country Flags | 0 | - | 4.97 | 83,616 |
| Pick a Picture - Animal Relations | 0 | - | 4.94 | 55,104 |
| Name that Historical Figure #1 | 0 | - | 4.63 | 336,510 |
| Name the Pixelated Landmark | 0 | - | 4.84 | 62,702 |
| Car Logos Quiz #1 | 0 | - | 4.44 | 535,427 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,790 |
| Name that Bug | 0 | - | 4.12 | 45,499 |
| Islands by Shape #1 | 0 | - | 4.32 | 84,251 |
| 1970s Celebrities by Picture #1 | 0 | - | 4.20 | 57,773 |
| 1970s Celebrities by Picture #2 | 0 | - | 4.21 | 50,534 |
| Name that Object #2 | 0 | - | 3.64 | 15,359 |
| Islands by Picture | 0 | - | 4.29 | 106,384 |
| Name that Object #3 | 0 | - | 3.93 | 14,331 |
| Classic Movies by Movie Posters | 0 | - | 4.45 | 24,166 |
| 1980s Movie Silhouettes | 0 | - | 4.97 | 103,210 |
| Famous Landmarks Out Of Focus #2 | 0 | - | 4.37 | 41,001 |
| Animals by Close-up Image | 0 | - | 4.42 | 217,333 |
| Aquatic Mammals by Picture | 0 | - | 4.41 | 45,432 |
| Extinct Animals by Picture | 0 | - | 4.49 | 35,065 |
| Mammals by Picture #1 | 0 | - | 4.70 | 91,438 |
| 1940s Celebrities by Picture | 0 | - | 4.43 | 47,881 |
| International Footballers by Picture | 0 | - | 4.50 | 55,140 |
| Name that Historical Figure #2 | 0 | - | 4.41 | 283,642 |
| Name that Historical Figure #5 | 0 | - | 4.43 | 107,154 |
| Name that Historical Figure #7 - U.S. Edition | 0 | - | 4.50 | 50,570 |
| Geography by Picture - A | 0 | - | 4.39 | 60,129 |
| Geography by Picture - D | 0 | - | 4.15 | 45,557 |
| Geography by Picture - F | 0 | - | 4.31 | 50,892 |
| Geography by Picture - G | 0 | - | 4.38 | 47,865 |
| Geography by Picture - J | 0 | - | 4.16 | 38,385 |
| Geography by Picture - K | 0 | - | 4.29 | 33,060 |
| Geography by Picture - C | 0 | - | 4.31 | 56,986 |
| Geography by Picture - L | 0 | - | 4.37 | 58,849 |
| Geography by Picture - M | 0 | - | 4.14 | 40,387 |
| Geography by Picture - P | 0 | - | 4.24 | 42,357 |
| Geography by Picture - S | 0 | - | 4.38 | 46,968 |
| Miscellaneous Flags Quiz | 0 | - | 4.42 | 279,344 |
| Country Flags Multiple Choice | 0 | - | 4.97 | 143,981 |
| Flag Maths | 0 | - | 4.64 | 57,706 |
| Satellite Images #1 | 0 | - | 4.46 | 129,173 |
| Satellite Images Quiz #2 | 0 | - | 4.63 | 109,133 |
| Satellite Images Quiz #4 | 0 | - | 4.55 | 88,775 |
| Satellite Images Quiz #5 | 0 | - | 4.52 | 49,774 |
| Satellite Images Quiz #6 | 0 | - | 4.50 | 38,884 |
| Cities by Picture #1 | 0 | - | 4.73 | 85,648 |
| Soccer Team Logos | 0 | - | 4.26 | 372,514 |
| Brand Logos Quiz #1 | 0 | - | 4.82 | 2,411,245 |
| Ultimate Car Logos Quiz | 0 | - | 4.80 | 178,137 |
| Car Logos Quiz #2 | 0 | - | 4.43 | 260,532 |
| Video Game Logos Quiz | 0 | - | 4.40 | 183,257 |
| Movie Logos | 0 | - | 4.33 | 237,054 |
| Brand Logos That Start With M | 0 | - | 4.45 | 62,207 |
| Brand Logos That Start with A | 0 | - | 4.52 | 69,753 |
| Pictures by Letter - E | 0 | - | 3.49 | 34,369 |
| Pictures by Letter - G | 0 | - | 4.14 | 28,028 |
| Pictures by Letter - L | 0 | - | 4.14 | 30,436 |
| Pictures by Letter - F | 0 | - | 4.17 | 28,915 |
| Pictures by Letter - Z | 0 | - | 4.05 | 23,370 |
| Pictures by Letter - Y | 0 | - | 4.22 | 26,190 |
| Pictures by Letter - R | 0 | - | 4.05 | 24,671 |
| Pictures by Letter - K | 0 | - | 4.18 | 25,019 |
| Pictures by Letter - I | 0 | - | 4.16 | 30,281 |
| Pictures by Letter - N | 0 | - | 4.11 | 24,403 |
| Pictures by Letter - P | 0 | - | 4.05 | 25,949 |
| Pictures by Letter - U | 0 | - | 4.10 | 20,703 |
| Pictures by Letter - T | 0 | - | 4.34 | 27,578 |
| History by Picture - A | 0 | - | 4.25 | 45,642 |
| History by Picture - B | 0 | - | 4.40 | 48,785 |
| History by Picture - C | 0 | - | 4.36 | 54,297 |
| History by Picture - F | 0 | - | 4.35 | 37,758 |
| History by Picture - G | 0 | - | 4.40 | 42,014 |
| History by Picture - D | 0 | - | 4.29 | 44,175 |
| History by Picture - E | 0 | - | 4.27 | 43,793 |
| History by Picture - H | 0 | - | 4.37 | 36,683 |
| History by Picture - K | 0 | - | 4.35 | 33,240 |
| History by Picture - M | 0 | - | 4.17 | 36,036 |
| History by Picture - N | 0 | - | 4.40 | 41,134 |
| History by Picture - O | 0 | - | 4.39 | 36,194 |
| History by Picture - T | 0 | - | 4.20 | 33,213 |
| Name that Nut, Seed, or Bean | 0 | - | 4.63 | 57,037 |
| Animals - Taxonomy to Common Name | 0 | - | 4.80 | 28,187 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,385 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,071 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,472 |
| Art Works Picture Quiz #1 | 0 | - | 4.51 | 118,749 |
| Art Works Picture Quiz #2 | 0 | - | 4.49 | 104,996 |
| Musical Instruments by Picture #1 | 0 | - | 4.52 | 268,395 |
| Flowers by Picture | 0 | - | 4.46 | 105,132 |
| Art Works Picture Quiz #3 | 0 | - | 4.45 | 48,628 |
| Authors by Picture | 0 | - | 4.48 | 25,466 |
| Fruit and Vegetable Emojis | 0 | - | 4.42 | 79,831 |
| WWII Figures by Picture | 0 | - | 4.89 | 63,925 |
| College Sports Logos Quiz #3 | 0 | - | 4.30 | 55,405 |
| Songs by Picture Quiz #1 | 0 | - | 4.68 | 65,637 |
| Songs by Picture Quiz #2 | 0 | - | 4.42 | 58,637 |
| Fish by Picture #1 | 0 | - | 4.41 | 108,301 |
| Animals A-Z by Picture | 0 | - | 4.08 | 66,164 |
| Mammals by Picture #3 | 0 | - | 4.39 | 61,933 |
| Mammals by Picture #4 | 0 | - | 4.03 | 34,026 |
| Birds by Picture #1 | 0 | - | 4.47 | 41,362 |
| Mammals by Picture #2 | 0 | - | 4.28 | 58,050 |
| Oscar Nominated Actors by Picture #1 | 0 | - | 4.42 | 164,870 |
| 1960s Celebrities by Picture #1 | 0 | - | 4.27 | 70,209 |
| 1960s Celebrities by Picture #2 | 0 | - | 4.26 | 51,263 |
| 1950s Celebrities by Picture #1 | 0 | - | 4.24 | 51,033 |
| 1980s Celebrities by Picture #2 | 0 | - | 4.19 | 71,461 |
| 1990s Celebrities by Picture #1 | 0 | - | 4.13 | 79,183 |
| 1990s Celebrities by Picture #2 | 0 | - | 4.16 | 72,138 |
| 2000s Celebrities by Picture #2 | 0 | - | 4.15 | 94,902 |
| 1950s Celebrities by Picture #2 | 0 | - | 4.29 | 46,026 |
| Name that Historical Figure #3 | 0 | - | 4.36 | 238,621 |
| Name that Historical Figure #4 | 0 | - | 4.29 | 158,599 |
| Name that Historical Figure #6 | 0 | - | 4.26 | 92,896 |
| Musicians by Picture #1 | 0 | - | 4.39 | 107,888 |
| Musicians by Picture #2 | 0 | - | 4.29 | 75,811 |
| Musicians by Picture #4 | 0 | - | 4.07 | 64,431 |
| Musicians by Picture #3 | 0 | - | 4.10 | 58,622 |
| Emoji Flags | 0 | - | 4.35 | 43,926 |
| Fill the Map of Europe by Guessing Flag Colors | 0 | - | 4.67 | 37,651 |
| Languages by Combined Flags | 0 | - | 4.53 | 99,533 |
| Satellite Images Quiz #3 | 0 | - | 4.35 | 73,311 |
| Satellite Images - Island Chains | 0 | - | 4.43 | 66,053 |
| Islands by Satellite Image #1 | 0 | - | 4.70 | 70,386 |
| Peninsulas by Satellite Image | 0 | - | 4.53 | 27,725 |
| Landmarks Picture Quiz #1 | 0 | - | 4.16 | 393,709 |
| Airline Logos | 0 | - | 4.45 | 140,289 |
| Fast Food Logos Quiz | 0 | - | 4.44 | 247,562 |
| Mostly-American Candy Logos | 0 | - | 4.14 | 158,372 |
| Brand Logos That Start With S | 0 | - | 4.37 | 57,132 |
| Brand Logos That Start With B | 0 | - | 4.38 | 59,601 |
| Brand Logos That Start With D | 0 | - | 4.37 | 61,102 |
| Brand Logos That Start With L | 0 | - | 4.39 | 60,638 |
| Brand Logos That Start With C | 0 | - | 4.17 | 49,310 |
| Vegetables by Picture | 0 | - | 4.39 | 63,099 |
| Pick a Picture - Musical Instruments | 0 | - | 4.53 | 52,075 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,341 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,738 |
| Organs of the Human Body (with map) | 0 | - | 4.11 | 118,867 |
| Countries with the Most Mangroves | 0 | - | 4.53 | 34,535 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,281 |
| Least-Forested Countries | 0 | - | 4.53 | 65,035 |
| Tropical Rainforest Countries | 0 | - | 4.68 | 81,867 |
| Northernmost Countries Without Glaciers | 0 | - | 4.61 | 36,104 |
