| Animals by Skeleton Image | 0 | - | 4.81 | 47,028 |
| Pick a Picture - Animal Relations | 0 | - | 4.94 | 55,965 |
| Animals by Close-up Image | 0 | - | 4.42 | 219,355 |
| Aquatic Mammals by Picture | 0 | - | 4.41 | 46,056 |
| Extinct Animals by Picture | 0 | - | 4.49 | 35,533 |
| Mammals by Picture #1 | 0 | - | 4.70 | 92,538 |
| Countries with Wild Tigers | 0 | - | 4.96 | 137,744 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,860 |
| Countries with the Most Venomous Animal Species | 0 | - | 4.87 | 87,790 |
| Fish by Picture #1 | 0 | - | 4.41 | 109,118 |
| Animals A-Z by Picture | 0 | - | 4.08 | 66,938 |
| Mammals by Picture #3 | 0 | - | 4.39 | 62,550 |
| Mammals by Picture #4 | 0 | - | 4.03 | 34,378 |
| Mammals by Picture #2 | 0 | - | 4.28 | 58,614 |
| Animals by Range on a World Map | 0 | - | 4.96 | 25,861 |
| Reptile Picture Quiz | 0 | - | 4.32 | 14,398 |
| Countries with the Most Sheep | 0 | - | 4.93 | 103,768 |
| Animals in World History | 0 | - | 4.74 | 44,699 |
| Countries With Two or More Bear Species | 0 | - | 4.90 | 22,931 |
| Countries with the Most Wolves | 0 | - | 4.92 | 108,736 |
| Countries that Catch the Most Fish | 0 | - | 4.90 | 113,259 |
| Sea Creatures by Picture | 0 | - | 4.27 | 17,831 |
| Former Countries by Territory Map | 0 | - | 4.96 | 104,160 |
| Empires by Maps | 0 | - | 4.98 | 122,472 |
| Merged Company Logos #1 | 0 | - | 4.90 | 107,597 |
| Top 15 Countries with the Most Cows | 0 | - | 4.73 | 107,531 |
| Countries with the Most Wild Elephants | 0 | - | 4.64 | 55,219 |
| Animal Populations of Countries | 0 | - | 4.52 | 44,102 |
| North American Cat-Named Sports Teams | 0 | - | 4.43 | 33,845 |
| Fish by Picture #2 | 0 | - | 4.09 | 18,763 |
| Flowers by Picture | 0 | - | 4.46 | 105,887 |
| Birds by Picture #1 | 0 | - | 4.47 | 42,116 |
| Countries with More Cows than People | 0 | - | 4.46 | 61,734 |
| North American Bird-Named Teams | 0 | - | 4.44 | 68,028 |
| Countries with NO Snakes | 0 | - | 4.51 | 63,682 |
| Islands by Shape #2 | 0 | - | 4.88 | 59,594 |
| Visual Memory Test - Random Cartoons | 0 | - | 4.98 | 105,628 |
| Play-Doh People from History | 0 | - | 4.99 | 95,739 |
| Famous Landmarks Out Of Focus #1 | 0 | - | 4.89 | 61,730 |
| Jeppy in Disguise #1 | 0 | - | 4.92 | 50,108 |
| Jeppy in Disguise #2 | 0 | - | 4.96 | 50,170 |
| Circular Cutouts from a World Map | 0 | - | 4.98 | 62,255 |
| All Country Flags of the World | 0 | - | 5.00 | 3,722,861 |
| Where Do Musk Oxen Live? | 0 | - | 4.63 | 15,360 |
| Extinct Animals | 0 | - | 4.13 | 27,592 |
| "Big Five" African Game Animals | 0 | - | 4.22 | 47,506 |
| Earliest Domestication of Animals | 0 | - | 4.34 | 28,322 |
| Animals in the News | 0 | - | 4.37 | 26,844 |
| Countries with Wild Lions | 0 | - | 4.77 | 26,608 |
| Megadiverse Countries | 0 | - | 4.96 | 148,406 |
| Country Flags Quiz #1 | 0 | - | 4.98 | 2,547,502 |
| Country Flags Quiz #2 | 0 | - | 4.99 | 1,098,059 |
| Country Flags Quiz #3 | 0 | - | 4.97 | 737,009 |
| Top 10 Countries with the Most Horses | 0 | - | 4.49 | 69,313 |
| Where Are These Doors? | 0 | - | 4.45 | 30,261 |
| Birds by Picture #2 | 0 | - | 4.33 | 36,773 |
| Birds by Picture #3 | 0 | - | 4.24 | 33,530 |
| Animals - Taxonomy to Common Name | 0 | - | 4.81 | 28,539 |
| Old World... or New World? | 0 | - | 4.66 | 21,483 |
| Asian Countries with NO Wolves | 0 | - | 4.60 | 19,047 |
| Years in History by Picture | 0 | - | 4.45 | 35,924 |
| Make a Stained Glass Window | 0 | - | 5.00 | 69,179 |
| Australian Animals By Picture | 0 | - | 4.45 | 31,801 |
| Famous Foreheads #1 | 0 | - | 4.47 | 75,531 |
| Flags with Crescents | 0 | - | 4.98 | 171,676 |
| Country Flag Trivia | 0 | - | 4.82 | 58,257 |
| Country Flags with Eagles - Picture Quiz | 0 | - | 4.98 | 105,137 |
| Country Flags with the Union Jack | 0 | - | 4.87 | 78,595 |
| Pixelated Flag Quiz | 0 | - | 4.97 | 88,838 |
| Flag Emblems Scavenger Hunt | 0 | - | 5.00 | 68,102 |
| Flags by Horizontal Stripes #1 | 0 | - | 4.84 | 86,135 |
| Badly Drawn Flags #1 | 0 | - | 4.99 | 61,169 |
| Country Flags with the Sun - Picture Quiz | 0 | - | 4.81 | 53,606 |
| Real vs. Fake Flags | 0 | - | 4.98 | 126,034 |
| Ultimate Car Logos Quiz | 0 | - | 4.81 | 184,691 |
| National Football Team Logos | 0 | - | 4.85 | 182,193 |
| Merged Company Logos #2 | 0 | - | 4.75 | 78,418 |
| Largest Land Animals of the Americas | 0 | - | 4.39 | 20,325 |
| Largest Land Animals of Africa | 0 | - | 4.36 | 12,827 |
| Top Countries for Shark Attacks | 0 | - | 4.47 | 45,961 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 84,228 |
| Countries with Fjords | 0 | - | 4.94 | 101,554 |
| Name that Object #1 | 0 | - | 3.57 | 96,649 |
| Flags to Languages | 0 | - | 4.95 | 174,671 |
| Animals that Appear on a Coat of Arms | 0 | - | 4.50 | 24,910 |
| Similar Country Flags - Multiple Choice Quiz | 0 | - | 4.94 | 51,120 |
| Build-a-Bird by Guessing Countries | 0 | - | 4.99 | 63,845 |
| Countries With The Most Bird Species | 0 | - | 4.93 | 33,291 |
| Terrestrial Biomes - Map Quiz | 0 | - | 4.99 | 21,836 |
| Fruits by Picture | 0 | - | 4.19 | 809,744 |
| Old Movies by Picture | 0 | - | 4.51 | 25,293 |
| Musical Instruments by Picture #2 | 0 | - | 4.24 | 47,341 |
| Geography by Picture - B | 0 | - | 4.42 | 55,825 |
| Geography by Picture - H | 0 | - | 4.50 | 58,422 |
| Geography by Picture - N | 0 | - | 4.45 | 42,387 |
| Geography by Picture - R | 0 | - | 4.56 | 41,185 |
| Geography by Picture - T | 0 | - | 4.54 | 58,035 |
| Random Logos Quiz | 0 | - | 4.33 | 209,873 |
| All North American Pro Sports Logos | 0 | - | 4.72 | 116,590 |
| Pictures by Letter - A | 0 | - | 4.18 | 33,681 |
| Pictures by Letter - J | 0 | - | 4.31 | 40,309 |
| Pictures by Letter - B | 0 | - | 4.32 | 44,299 |
| Pictures by Letter - D | 0 | - | 4.14 | 37,839 |
| Pictures by Letter - M | 0 | - | 4.24 | 38,047 |
| Three Real and One Fake - Country Flags | 0 | - | 4.97 | 84,844 |
| Name that Historical Figure #1 | 0 | - | 4.63 | 340,939 |
| Name the Pixelated Landmark | 0 | - | 4.85 | 63,630 |
| Car Logos Quiz #1 | 0 | - | 4.52 | 544,975 |
| Largest Land Animals of Asia | 0 | - | 3.64 | 8,358 |
| Capital Cities by Body of Water | 0 | - | 4.85 | 57,895 |
| Countries With No Rivers | 0 | - | 4.96 | 77,245 |
| Name a Valid Country on Each River | 0 | - | 4.95 | 63,121 |
| Countries That Touch the Baltic Sea | 0 | - | 4.98 | 116,218 |
| North Sea Countries | 0 | - | 4.92 | 87,769 |
| Black Sea Countries | 0 | - | 4.87 | 60,788 |
| Countries That Touch the Red Sea | 0 | - | 4.91 | 65,655 |
| Caspian Sea Countries | 0 | - | 4.91 | 63,740 |
| Countries with the Longest Coastlines | 0 | - | 4.81 | 414,352 |
| Countries with the Shortest Coastlines | 0 | - | 4.89 | 67,419 |
| Islands by Shape #1 | 0 | - | 4.33 | 84,546 |
| 1970s Celebrities by Picture #1 | 0 | - | 4.20 | 58,315 |
| 1970s Celebrities by Picture #2 | 0 | - | 4.21 | 51,009 |
| Elements by Picture | 0 | - | 4.27 | 70,374 |
| Name that Object #2 | 0 | - | 3.63 | 15,543 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,541 |
| Islands by Picture | 0 | - | 4.28 | 107,932 |
| Name that Object #3 | 0 | - | 3.93 | 14,477 |
| Classic Movies by Movie Posters | 0 | - | 4.45 | 24,480 |
| 1980s Movie Silhouettes | 0 | - | 4.97 | 104,796 |
| Famous Landmarks Out Of Focus #2 | 0 | - | 4.37 | 41,610 |
| Dog Breed Picture Quiz | 0 | - | 4.34 | 206,781 |
| 1940s Celebrities by Picture | 0 | - | 4.43 | 48,242 |
| International Footballers by Picture | 0 | - | 4.51 | 56,565 |
| Name that Historical Figure #2 | 0 | - | 4.42 | 287,310 |
| Name that Historical Figure #5 | 0 | - | 4.43 | 109,607 |
| Name that Historical Figure #7 - U.S. Edition | 0 | - | 4.51 | 51,746 |
| Geography by Picture - A | 0 | - | 4.39 | 60,474 |
| Geography by Picture - D | 0 | - | 4.15 | 45,818 |
| Geography by Picture - F | 0 | - | 4.31 | 51,225 |
| Geography by Picture - G | 0 | - | 4.39 | 48,117 |
| Geography by Picture - J | 0 | - | 4.16 | 38,628 |
| Geography by Picture - K | 0 | - | 4.29 | 33,285 |
| Geography by Picture - C | 0 | - | 4.31 | 57,273 |
| Geography by Picture - L | 0 | - | 4.37 | 59,170 |
| Geography by Picture - M | 0 | - | 4.14 | 40,612 |
| Geography by Picture - P | 0 | - | 4.24 | 42,597 |
| Geography by Picture - S | 0 | - | 4.38 | 47,203 |
| Miscellaneous Flags Quiz | 0 | - | 4.42 | 282,346 |
| Country Flags Multiple Choice | 0 | - | 4.97 | 145,622 |
| Flag Maths | 0 | - | 4.61 | 57,862 |
| Satellite Images #1 | 0 | - | 4.46 | 130,055 |
| Satellite Images Quiz #2 | 0 | - | 4.64 | 109,745 |
| Satellite Images Quiz #4 | 0 | - | 4.55 | 89,437 |
| Satellite Images Quiz #5 | 0 | - | 4.52 | 50,286 |
| Satellite Images Quiz #6 | 0 | - | 4.50 | 39,252 |
| Cities by Picture #1 | 0 | - | 4.74 | 86,650 |
| Soccer Team Logos | 0 | - | 4.26 | 378,159 |
| Brand Logos Quiz #1 | 0 | - | 4.83 | 2,440,977 |
| Car Logos Quiz #2 | 0 | - | 4.43 | 264,243 |
| Video Game Logos Quiz | 0 | - | 4.40 | 185,227 |
| Movie Logos | 0 | - | 4.33 | 240,740 |
| Brand Logos That Start with A | 0 | - | 4.52 | 71,309 |
| Pictures by Letter - E | 0 | - | 3.51 | 34,677 |
| Pictures by Letter - G | 0 | - | 4.14 | 28,413 |
| Pictures by Letter - L | 0 | - | 4.14 | 30,792 |
| Pictures by Letter - F | 0 | - | 4.18 | 29,297 |
| Pictures by Letter - Z | 0 | - | 4.05 | 23,621 |
| Pictures by Letter - Y | 0 | - | 4.21 | 26,476 |
| Pictures by Letter - R | 0 | - | 4.05 | 24,955 |
| Pictures by Letter - K | 0 | - | 4.18 | 25,315 |
| Pictures by Letter - I | 0 | - | 4.16 | 30,606 |
| Pictures by Letter - N | 0 | - | 4.11 | 24,684 |
| Pictures by Letter - P | 0 | - | 4.05 | 26,230 |
| Pictures by Letter - U | 0 | - | 4.10 | 20,956 |
| Pictures by Letter - T | 0 | - | 4.34 | 27,891 |
| History by Picture - A | 0 | - | 4.26 | 46,216 |
| History by Picture - B | 0 | - | 4.40 | 49,420 |
| History by Picture - C | 0 | - | 4.33 | 54,956 |
| History by Picture - F | 0 | - | 4.35 | 38,252 |
| History by Picture - G | 0 | - | 4.40 | 42,490 |
| History by Picture - D | 0 | - | 4.29 | 44,717 |
| History by Picture - E | 0 | - | 4.25 | 44,297 |
| History by Picture - H | 0 | - | 4.37 | 37,138 |
| History by Picture - K | 0 | - | 4.35 | 33,662 |
| History by Picture - M | 0 | - | 4.17 | 36,440 |
| History by Picture - N | 0 | - | 4.40 | 41,579 |
| History by Picture - O | 0 | - | 4.39 | 36,593 |
| History by Picture - T | 0 | - | 4.20 | 33,587 |
| Name that Nut, Seed, or Bean | 0 | - | 4.57 | 57,858 |
| Baby, Male and Female Animals | 0 | - | 4.43 | 151,221 |
| Words Containing Animals #1 | 0 | - | 4.21 | 43,642 |
| Words Containing Animals #2 | 0 | - | 4.09 | 34,509 |
| Animal Adjectives | 0 | - | 4.77 | 60,237 |
| Animals: No Vowels #1 | 0 | - | 4.56 | 64,428 |
| Bird in the Answers | 0 | - | 4.11 | 34,011 |
| Bird Knowledge #2 | 0 | - | 4.42 | 14,254 |
| Natural Features of Countries #2 | 0 | - | 4.55 | 37,690 |
| Countries Farthest From the Sea | 0 | - | 4.98 | 75,062 |
| African Great Lakes | 0 | - | 4.82 | 67,099 |
| Five Countries with the Longest Coastline by Continent | 0 | - | 4.97 | 116,077 |
