| Countries of the World Quiz | 0 | - | 5.00 | 47,346,011 |
| Majority Muslim Countries | 0 | - | 4.98 | 373,369 |
| NATO Countries | 0 | - | 4.98 | 279,418 |
| EU Countries Quiz | 0 | - | 4.99 | 273,043 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 287,549 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 272,065 |
| Top Five Countries by Religion | 0 | - | 4.93 | 170,840 |
| Countries with the Most Elite Universities | 0 | - | 4.94 | 148,044 |
| Countries with NO Military | 0 | - | 4.97 | 62,005 |
| Countries by Number of Books Published | 0 | - | 4.95 | 72,424 |
| Landlocked Countries | 0 | - | 4.99 | 419,127 |
| Countries with the Most Christians | 0 | - | 4.92 | 142,853 |
| Countries with the Most Tanks | 0 | - | 4.91 | 107,175 |
| Biggest Export Partners For Every Country | 0 | - | 4.98 | 50,390 |
| Top Oil Reserve Countries | 0 | - | 4.93 | 74,678 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 319,959 |
| Least Christian Countries with Exceptions | 0 | - | 4.90 | 87,931 |
| Buddhist Countries | 0 | - | 4.96 | 144,101 |
| Countries with the Most Billionaires | 0 | - | 4.90 | 334,990 |
| Countries with the Most Millionaires | 0 | - | 4.86 | 123,243 |
| Countries of Europe Quiz | 0 | - | 5.00 | 3,757,779 |
| Sahara Desert Countries | 0 | - | 4.98 | 163,057 |
| Himalayan Countries | 0 | - | 4.94 | 137,500 |
| Andean Countries | 0 | - | 4.95 | 83,977 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 63,251 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 124,716 |
| Coffee Producing Countries | 0 | - | 4.83 | 66,866 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 65,373 |
| Danube Countries | 0 | - | 4.97 | 71,686 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 116,583 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,077 |
| Countries with the Worst Passports | 0 | - | 4.94 | 83,685 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 148,756 |
| European Landlocked Countries | 0 | - | 4.99 | 146,797 |
| Partially Recognized Countries | 0 | - | 4.98 | 106,160 |
| Countries with the Most Species | 0 | - | 4.99 | 102,927 |
| Countries 197 to 205 | 0 | - | 4.89 | 70,295 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,436 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,597 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,320 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,001 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,374 |
| Countries in the Alps | 0 | - | 4.87 | 117,712 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 95,154 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 106,398 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,432 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,016 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,124 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 95,704 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,301 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,204 |
| Largest Country by Body of Water | 0 | - | 4.96 | 57,976 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 62,571 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,495 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,345 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 103,946 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,202 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,223 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 118,220 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,077 |
| Countries that Host the Most Refugees | 0 | - | 4.95 | 59,582 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 45,553 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 242,460 |
| World Countries - Blind Typing | 0 | - | 5.00 | 107,265 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,011 |
| Largest Countries By Category | 0 | - | 4.97 | 157,664 |
| Countries by Countries | 0 | - | 4.96 | 62,855 |
| Country Flags With Only Two Colors | 0 | - | 4.92 | 88,339 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 329,135 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 374,651 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 405,187 |
| Island Countries | 0 | - | 4.99 | 709,832 |
| Biggest Countries by Area | 0 | - | 4.99 | 1,046,234 |
| Northernmost Countries | 0 | - | 4.99 | 360,551 |
| Countries of South America | 0 | - | 5.00 | 923,116 |
| Countries of Oceania | 0 | - | 5.00 | 1,051,319 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,866,855 |
| "Land" Countries | 0 | - | 4.98 | 335,833 |
| Countries that Start with A | 0 | - | 4.98 | 2,159,392 |
| Countries that Start with B | 0 | - | 4.95 | 2,291,364 |
| Countries that Start with C | 0 | - | 4.96 | 1,819,573 |
| Countries that Start with D | 0 | - | 4.96 | 707,884 |
| Countries that Start with E | 0 | - | 4.95 | 1,375,150 |
| Countries that Start with G | 0 | - | 4.97 | 1,500,830 |
| Countries that Start with H | 0 | - | 4.96 | 603,326 |
| Countries that Start with I | 0 | - | 4.92 | 1,286,413 |
| Countries that Start with J | 0 | - | 4.98 | 601,157 |
| Countries that Start with K | 0 | - | 4.97 | 814,471 |
| Countries that Start with L | 0 | - | 4.98 | 1,089,149 |
| Countries that Start with N | 0 | - | 4.93 | 1,116,109 |
| Countries that Start with P | 0 | - | 4.94 | 1,214,600 |
| Countries that Start with S | 0 | - | 4.98 | 1,752,705 |
| Countries that Start with T | 0 | - | 4.90 | 1,008,658 |
| Countries that Start with U | 0 | - | 4.97 | 903,513 |
| Countries that Start with V | 0 | - | 4.98 | 608,555 |
| Countries that Start with F | 0 | - | 4.83 | 616,469 |
| Countries that Start with M | 0 | - | 4.97 | 1,379,895 |
| Countries with the Most Catholics | 0 | - | 4.90 | 109,152 |
| Orthodox Countries | 0 | - | 4.92 | 131,365 |
| Richest Island Countries | 0 | - | 4.84 | 100,335 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,376,063 |
| Monarchies of Europe | 0 | - | 4.90 | 97,987 |
| Monarchies of Asia | 0 | - | 4.97 | 70,998 |
| World Countries by 10 Category Elimination #1 | 0 | - | 4.97 | 122,583 |
| Asian Country Superlatives | 0 | - | 4.84 | 80,790 |
| Countries with the Most Muslims | 0 | - | 4.95 | 160,186 |
| Countries with the Most Exports | 0 | - | 4.96 | 155,147 |
| Top Crude Oil Producing Countries | 0 | - | 4.89 | 189,467 |
| Countries by Oil Consumption | 0 | - | 4.96 | 120,306 |
| Largest Economies in 2050 | 0 | - | 4.90 | 111,307 |
| Richest Countries by Per-Capita GDP | 0 | - | 4.96 | 270,549 |
| Countries With Highest GDP as a Percent of Continent | 0 | - | 4.96 | 104,090 |
| Countries with the Highest GDP per Square Kilometer | 0 | - | 4.89 | 84,389 |
| Five Countries with Most Christians by Continent | 0 | - | 4.99 | 111,517 |
| Five Biggest Economies by Continent | 0 | - | 4.98 | 194,965 |
| Most Visited Countries by JetPunkers | 0 | - | 4.85 | 118,194 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 173,079 |
| Countries with Megacities | 0 | - | 4.99 | 260,856 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 198,933 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,020 |
| Countries With More than 200 Million People | 0 | - | 4.96 | 137,212 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,034 |
| Countries by Official Language | 0 | - | 4.95 | 194,663 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 295,576 |
| Countries in their Native Language | 0 | - | 4.99 | 198,214 |
| Independence from Whom | 0 | - | 4.99 | 211,352 |
| Subdivisions by Country | 0 | - | 4.86 | 50,294 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 131,736 |
| Megadiverse Countries | 0 | - | 4.96 | 134,781 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 131,567 |
| Countries Producing the Most Sugarcane | 0 | - | 4.95 | 55,191 |
| Countries with Multiple Big Islands | 0 | - | 4.93 | 125,762 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,023 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 162,727 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,391 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,002 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 153,851 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,492 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 44,996 |
| Countries by Sports League Revenue | 0 | - | 4.94 | 77,027 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 107,726 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,004 |
| Countries with the Highest HDI | 0 | - | 4.95 | 136,790 |
| Top 10 Biggest Economies in the Americas | 0 | - | 4.94 | 91,991 |
| Richest Countries A-Z | 0 | - | 4.91 | 102,797 |
| Large Countries with Small Economies | 0 | - | 4.95 | 80,785 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,048 |
| Southernmost Countries of the World | 0 | - | 4.99 | 227,537 |
| Countries by Inland Surface Water | 0 | - | 4.94 | 104,941 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 122,659 |
| Countries With the Most Languages | 0 | - | 4.90 | 201,367 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.95 | 110,533 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 93,688 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 98,842 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,273 |
| Tallest Countries North to South | 0 | - | 4.83 | 120,297 |
| Widest Countries East to West | 0 | - | 4.92 | 129,390 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,387 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 185,973 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 97,998 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,522 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,236 |
| Countries with the Most Desert | 0 | - | 4.93 | 127,563 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,242 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,729 |
| Countries with Double Letters | 0 | - | 4.97 | 95,118 |
| Countries that End in N | 0 | - | 4.95 | 170,044 |
| Countries with Five Letters | 0 | - | 4.96 | 280,388 |
| Countries with Six Letters | 0 | - | 4.94 | 212,518 |
| Countries with W | 0 | - | 4.97 | 159,536 |
| Countries with Z | 0 | - | 4.98 | 289,844 |
| Countries with Letters Missing | 0 | - | 4.96 | 185,767 |
| Countries That End in U | 0 | - | 4.95 | 120,420 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.98 | 133,775 |
| Countries that End in O | 0 | - | 4.92 | 159,209 |
| Countries that End in R | 0 | - | 4.87 | 118,740 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,518 |
| Countries Ending in "IA" | 0 | - | 4.99 | 208,359 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,131 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,095 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 141,679 |
| Countries That End in Y | 0 | - | 4.90 | 185,653 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 197,249 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 152,447 |
| Countries that End in I | 0 | - | 4.94 | 134,877 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 183,108 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,585 |
| Countries That End in NIA | 0 | - | 4.92 | 109,523 |
| Countries That End in BIA | 0 | - | 4.93 | 148,860 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 166,743 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,073 |
| Countries That End in RIA | 0 | - | 4.93 | 126,548 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 110,650 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 226,741 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,255 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 125,619 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,144 |
| Add A Letter - Make a Country | 0 | - | 4.82 | 74,339 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 52,692 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,254 |
