| Metals of Antiquity | 0 | - | 4.95 | 93,780 |
| Animals by Skeleton Image | 0 | - | 4.81 | 46,805 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,468 |
| Former Countries by Territory Map | 0 | - | 4.96 | 103,462 |
| Empires by Maps | 0 | - | 4.98 | 121,454 |
| Merged Company Logos #1 | 0 | - | 4.90 | 107,029 |
| Planets By Picture Quiz | 0 | - | 4.49 | 57,217 |
| Islands by Shape #2 | 0 | - | 4.88 | 59,443 |
| Visual Memory Test - Random Cartoons | 0 | - | 4.98 | 105,063 |
| Play-Doh People from History | 0 | - | 4.99 | 95,327 |
| Famous Landmarks Out Of Focus #1 | 0 | - | 4.89 | 61,421 |
| Jeppy in Disguise #1 | 0 | - | 4.92 | 49,838 |
| Jeppy in Disguise #2 | 0 | - | 4.96 | 49,916 |
| Circular Cutouts from a World Map | 0 | - | 4.98 | 61,935 |
| All Country Flags of the World | 0 | - | 5.00 | 3,699,114 |
| Elements Named for Countries | 0 | - | 4.52 | 24,901 |
| Country Flags Quiz #1 | 0 | - | 4.98 | 2,543,228 |
| Country Flags Quiz #2 | 0 | - | 4.99 | 1,095,884 |
| Country Flags Quiz #3 | 0 | - | 4.97 | 735,532 |
| Where Are These Doors? | 0 | - | 4.45 | 30,152 |
| Animals - Taxonomy to Common Name | 0 | - | 4.81 | 28,416 |
| Years in History by Picture | 0 | - | 4.44 | 35,693 |
| Make a Stained Glass Window | 0 | - | 5.00 | 68,880 |
| Famous Foreheads #1 | 0 | - | 4.47 | 75,268 |
| Flags with Crescents | 0 | - | 4.98 | 170,905 |
| Country Flag Trivia | 0 | - | 4.81 | 57,754 |
| Country Flags with Eagles - Picture Quiz | 0 | - | 4.98 | 104,576 |
| Country Flags with the Union Jack | 0 | - | 4.87 | 78,145 |
| Pixelated Flag Quiz | 0 | - | 4.97 | 88,249 |
| Flag Emblems Scavenger Hunt | 0 | - | 5.00 | 67,723 |
| Flags by Horizontal Stripes #1 | 0 | - | 4.84 | 85,756 |
| Badly Drawn Flags #1 | 0 | - | 4.99 | 60,878 |
| Country Flags with the Sun - Picture Quiz | 0 | - | 4.83 | 53,316 |
| Real vs. Fake Flags | 0 | - | 4.98 | 125,374 |
| Ultimate Car Logos Quiz | 0 | - | 4.81 | 183,061 |
| National Football Team Logos | 0 | - | 4.85 | 181,351 |
| Merged Company Logos #2 | 0 | - | 4.75 | 77,958 |
| Countries with the Highest Carbon Dioxide Emissions | 0 | - | 4.97 | 109,804 |
| Name that Object #1 | 0 | - | 3.57 | 96,573 |
| Flags to Languages | 0 | - | 4.95 | 174,257 |
| Similar Country Flags - Multiple Choice Quiz | 0 | - | 4.94 | 50,896 |
| Countries with Glaciers | 0 | - | 4.97 | 105,688 |
| The Voyage of Darwin - Animated Map Quiz | 0 | - | 4.99 | 14,572 |
| Countries Reducing Carbon Dioxide Emissions the Most | 0 | - | 4.89 | 64,861 |
| Countries with the Most Forest | 0 | - | 4.87 | 147,838 |
| Fruits by Picture | 0 | - | 4.19 | 808,650 |
| Old Movies by Picture | 0 | - | 4.51 | 25,205 |
| Musical Instruments by Picture #2 | 0 | - | 4.24 | 47,247 |
| Geography by Picture - B | 0 | - | 4.42 | 55,734 |
| Geography by Picture - H | 0 | - | 4.50 | 58,336 |
| Geography by Picture - N | 0 | - | 4.45 | 42,303 |
| Geography by Picture - R | 0 | - | 4.56 | 41,111 |
| Geography by Picture - T | 0 | - | 4.54 | 57,957 |
| Random Logos Quiz | 0 | - | 4.33 | 209,115 |
| All North American Pro Sports Logos | 0 | - | 4.70 | 115,987 |
| Pictures by Letter - A | 0 | - | 4.18 | 33,581 |
| Pictures by Letter - J | 0 | - | 4.31 | 40,222 |
| Pictures by Letter - B | 0 | - | 4.32 | 44,183 |
| Pictures by Letter - D | 0 | - | 4.14 | 37,752 |
| Pictures by Letter - M | 0 | - | 4.24 | 37,949 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,407 |
| Three Real and One Fake - Country Flags | 0 | - | 4.97 | 84,576 |
| Pick a Picture - Animal Relations | 0 | - | 4.94 | 55,742 |
| Name that Historical Figure #1 | 0 | - | 4.63 | 338,738 |
| Name the Pixelated Landmark | 0 | - | 4.85 | 63,322 |
| Car Logos Quiz #1 | 0 | - | 4.52 | 542,697 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 36,116 |
| Name that Bug | 0 | - | 4.12 | 45,609 |
| Islands by Shape #1 | 0 | - | 4.33 | 84,466 |
| 1970s Celebrities by Picture #1 | 0 | - | 4.20 | 58,178 |
| 1970s Celebrities by Picture #2 | 0 | - | 4.21 | 50,886 |
| Name that Object #2 | 0 | - | 3.64 | 15,494 |
| Islands by Picture | 0 | - | 4.28 | 107,543 |
| Name that Object #3 | 0 | - | 3.93 | 14,445 |
| Classic Movies by Movie Posters | 0 | - | 4.45 | 24,416 |
| 1980s Movie Silhouettes | 0 | - | 4.97 | 104,466 |
| Famous Landmarks Out Of Focus #2 | 0 | - | 4.37 | 41,455 |
| Animals by Close-up Image | 0 | - | 4.42 | 218,829 |
| Aquatic Mammals by Picture | 0 | - | 4.41 | 45,901 |
| Extinct Animals by Picture | 0 | - | 4.49 | 35,413 |
| Mammals by Picture #1 | 0 | - | 4.70 | 92,243 |
| 1940s Celebrities by Picture | 0 | - | 4.43 | 48,155 |
| International Footballers by Picture | 0 | - | 4.51 | 56,190 |
| Name that Historical Figure #2 | 0 | - | 4.42 | 285,599 |
| Name that Historical Figure #5 | 0 | - | 4.43 | 108,295 |
| Name that Historical Figure #7 - U.S. Edition | 0 | - | 4.51 | 51,085 |
| Geography by Picture - A | 0 | - | 4.39 | 60,384 |
| Geography by Picture - D | 0 | - | 4.15 | 45,751 |
| Geography by Picture - F | 0 | - | 4.31 | 51,130 |
| Geography by Picture - G | 0 | - | 4.39 | 48,047 |
| Geography by Picture - J | 0 | - | 4.16 | 38,559 |
| Geography by Picture - K | 0 | - | 4.29 | 33,216 |
| Geography by Picture - C | 0 | - | 4.31 | 57,186 |
| Geography by Picture - L | 0 | - | 4.37 | 59,092 |
| Geography by Picture - M | 0 | - | 4.14 | 40,548 |
| Geography by Picture - P | 0 | - | 4.24 | 42,528 |
| Geography by Picture - S | 0 | - | 4.38 | 47,144 |
| Miscellaneous Flags Quiz | 0 | - | 4.42 | 281,610 |
| Country Flags Multiple Choice | 0 | - | 4.97 | 145,194 |
| Flag Maths | 0 | - | 4.61 | 57,815 |
| Satellite Images #1 | 0 | - | 4.47 | 129,595 |
| Satellite Images Quiz #2 | 0 | - | 4.63 | 109,493 |
| Satellite Images Quiz #4 | 0 | - | 4.55 | 89,075 |
| Satellite Images Quiz #5 | 0 | - | 4.52 | 50,096 |
| Satellite Images Quiz #6 | 0 | - | 4.50 | 39,101 |
| Cities by Picture #1 | 0 | - | 4.74 | 86,437 |
| Soccer Team Logos | 0 | - | 4.26 | 376,696 |
| Brand Logos Quiz #1 | 0 | - | 4.83 | 2,433,929 |
| Car Logos Quiz #2 | 0 | - | 4.43 | 263,320 |
| Video Game Logos Quiz | 0 | - | 4.40 | 184,731 |
| Movie Logos | 0 | - | 4.33 | 239,807 |
| Brand Logos That Start with A | 0 | - | 4.52 | 70,930 |
| Pictures by Letter - E | 0 | - | 3.51 | 34,610 |
| Pictures by Letter - G | 0 | - | 4.14 | 28,336 |
| Pictures by Letter - L | 0 | - | 4.14 | 30,709 |
| Pictures by Letter - F | 0 | - | 4.18 | 29,211 |
| Pictures by Letter - Z | 0 | - | 4.05 | 23,562 |
| Pictures by Letter - Y | 0 | - | 4.21 | 26,420 |
| Pictures by Letter - R | 0 | - | 4.05 | 24,885 |
| Pictures by Letter - K | 0 | - | 4.18 | 25,249 |
| Pictures by Letter - I | 0 | - | 4.16 | 30,528 |
| Pictures by Letter - N | 0 | - | 4.11 | 24,613 |
| Pictures by Letter - P | 0 | - | 4.05 | 26,170 |
| Pictures by Letter - U | 0 | - | 4.10 | 20,892 |
| Pictures by Letter - T | 0 | - | 4.34 | 27,810 |
| History by Picture - A | 0 | - | 4.26 | 46,048 |
| History by Picture - B | 0 | - | 4.40 | 49,228 |
| History by Picture - C | 0 | - | 4.36 | 54,759 |
| History by Picture - F | 0 | - | 4.35 | 38,102 |
| History by Picture - G | 0 | - | 4.40 | 42,344 |
| History by Picture - D | 0 | - | 4.29 | 44,552 |
| History by Picture - E | 0 | - | 4.25 | 44,137 |
| History by Picture - H | 0 | - | 4.37 | 36,993 |
| History by Picture - K | 0 | - | 4.35 | 33,534 |
| History by Picture - M | 0 | - | 4.17 | 36,312 |
| History by Picture - N | 0 | - | 4.40 | 41,455 |
| History by Picture - O | 0 | - | 4.39 | 36,482 |
| History by Picture - T | 0 | - | 4.20 | 33,473 |
| Name that Nut, Seed, or Bean | 0 | - | 4.57 | 57,565 |
| Countries with the Most HIV | 0 | - | 4.46 | 44,515 |
| Countries with the Most Malaria Deaths | 0 | - | 4.45 | 45,485 |
| Countries that Desalinate the Most Water | 0 | - | 4.77 | 41,827 |
| Art Works Picture Quiz #1 | 0 | - | 4.51 | 119,666 |
| Art Works Picture Quiz #2 | 0 | - | 4.49 | 105,720 |
| Musical Instruments by Picture #1 | 0 | - | 4.52 | 269,558 |
| Flowers by Picture | 0 | - | 4.46 | 105,808 |
| Art Works Picture Quiz #3 | 0 | - | 4.45 | 48,909 |
| Authors by Picture | 0 | - | 4.48 | 25,605 |
| Fruit and Vegetable Emojis | 0 | - | 4.45 | 90,670 |
| WWII Figures by Picture | 0 | - | 4.89 | 66,050 |
| College Sports Logos Quiz #3 | 0 | - | 4.30 | 56,062 |
| Songs by Picture Quiz #1 | 0 | - | 4.68 | 66,389 |
| Songs by Picture Quiz #2 | 0 | - | 4.42 | 59,200 |
| Fish by Picture #1 | 0 | - | 4.41 | 108,750 |
| Animals A-Z by Picture | 0 | - | 4.08 | 66,734 |
| Mammals by Picture #3 | 0 | - | 4.39 | 62,396 |
| Mammals by Picture #4 | 0 | - | 4.03 | 34,251 |
| Birds by Picture #1 | 0 | - | 4.47 | 41,941 |
| Mammals by Picture #2 | 0 | - | 4.28 | 58,445 |
| Oscar Nominated Actors by Picture #1 | 0 | - | 4.42 | 165,689 |
| 1960s Celebrities by Picture #1 | 0 | - | 4.27 | 70,670 |
| 1960s Celebrities by Picture #2 | 0 | - | 4.26 | 51,605 |
| 1950s Celebrities by Picture #1 | 0 | - | 4.24 | 51,321 |
| 1980s Celebrities by Picture #2 | 0 | - | 4.19 | 72,020 |
| 1990s Celebrities by Picture #1 | 0 | - | 4.14 | 79,681 |
| 1990s Celebrities by Picture #2 | 0 | - | 4.16 | 72,728 |
| 2000s Celebrities by Picture #2 | 0 | - | 4.15 | 95,954 |
| 1950s Celebrities by Picture #2 | 0 | - | 4.29 | 46,312 |
| Name that Historical Figure #3 | 0 | - | 4.36 | 240,291 |
| Name that Historical Figure #4 | 0 | - | 4.29 | 159,787 |
| Name that Historical Figure #6 | 0 | - | 4.26 | 93,838 |
| Musicians by Picture #1 | 0 | - | 4.37 | 109,710 |
| Musicians by Picture #2 | 0 | - | 4.29 | 77,147 |
| Musicians by Picture #4 | 0 | - | 4.07 | 65,423 |
| Musicians by Picture #3 | 0 | - | 4.10 | 59,410 |
| Emoji Flags | 0 | - | 4.35 | 44,237 |
| Fill the Map of Europe by Guessing Flag Colors | 0 | - | 4.68 | 38,139 |
| Languages by Combined Flags | 0 | - | 4.53 | 100,454 |
| Satellite Images Quiz #3 | 0 | - | 4.35 | 73,514 |
| Satellite Images - Island Chains | 0 | - | 4.43 | 66,810 |
| Islands by Satellite Image #1 | 0 | - | 4.70 | 71,119 |
| Peninsulas by Satellite Image | 0 | - | 4.53 | 27,899 |
| Landmarks Picture Quiz #1 | 0 | - | 4.16 | 395,362 |
| Airline Logos | 0 | - | 4.45 | 141,244 |
| Fast Food Logos Quiz | 0 | - | 4.45 | 249,176 |
| Mostly-American Candy Logos | 0 | - | 4.14 | 159,667 |
| Brand Logos That Start With M | 0 | - | 4.38 | 63,337 |
| Brand Logos That Start With S | 0 | - | 4.37 | 58,095 |
| Brand Logos That Start With B | 0 | - | 4.38 | 60,456 |
| Brand Logos That Start With D | 0 | - | 4.36 | 62,010 |
| Brand Logos That Start With L | 0 | - | 4.39 | 61,707 |
| Brand Logos That Start With C | 0 | - | 4.20 | 49,999 |
| Vegetables by Picture | 0 | - | 4.36 | 63,685 |
| Pick a Picture - Musical Instruments | 0 | - | 4.53 | 52,599 |
| Northernmost Countries Without Glaciers | 0 | - | 4.62 | 36,181 |
| Albert Einstein Trivia | 0 | - | 4.58 | 18,429 |
| Animal Anatomy Quiz | 0 | - | 4.39 | 59,926 |
| Organs of the Human Body (with map) | 0 | - | 4.10 | 119,735 |
| Countries with the Most Mangroves | 0 | - | 4.54 | 34,703 |
| Worst Plastic Polluting Countries | 0 | - | 4.51 | 66,756 |
