| Random Symbol to Element | 0 | - | 4.88 | 92,216 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,090,713 |
| Songs with Colors in the Title | 0 | - | 3.88 | 41,506 |
| Songs with Countries in the Title | 0 | - | 3.85 | 44,462 |
| Songs with Animals in the Title #1 | 0 | - | 4.36 | 129,016 |
| International Scientific Units | 0 | - | 4.95 | 155,342 |
| First Names of Scientists | 0 | - | 4.50 | 56,457 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,225 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,220,464 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,826 |
| Periodic Table Elements A-Z | 0 | - | 4.78 | 102,192 |
| Name a Valid Element | 0 | - | 4.64 | 69,572 |
| Birthstones by Month | 0 | - | 4.41 | 80,481 |
| Elements by Symbol | 0 | - | 4.92 | 195,511 |
| Speed Symbol by Element | 0 | - | 4.91 | 103,629 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,448 |
| Noble Gases | 0 | - | 4.89 | 77,448 |
| Elements that are Gases at Room Temperature | 0 | - | 4.85 | 64,047 |
| Periodic Table Symbols | 0 | - | 4.97 | 70,913 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 80,873 |
| Name the Virus | 0 | - | 4.86 | 76,252 |
| Songs with Love in the Title | 0 | - | 4.14 | 18,716 |
| Songs by Picture Quiz #1 | 0 | - | 4.68 | 65,364 |
| Songs by Picture Quiz #2 | 0 | - | 4.41 | 58,409 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,701 |
| Category Elimination - Elements | 0 | - | 4.62 | 53,233 |
| Astronomy Decoder | 0 | - | 4.50 | 37,845 |
| Title in the Lyrics Quiz #8 | 0 | - | 4.52 | 112,125 |
| Title in the Lyrics Quiz #9 | 0 | - | 4.47 | 101,924 |
| Books with Names in the Title #2 | 0 | - | 4.42 | 54,459 |
| Citrus Fruits | 0 | - | 3.65 | 41,949 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,588 |
| Elemental Words | 0 | - | 4.96 | 51,986 |
| Metals of Antiquity | 0 | - | 4.94 | 92,907 |
| Pasta... or Composer? | 0 | - | 4.63 | 26,535 |
| Songs with Food in the Title | 0 | - | 4.26 | 42,407 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,587,902 |
| Books with Animals in the Title #1 | 0 | - | 4.41 | 74,297 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 79,832 |
| Famous Scientists | 0 | - | 4.57 | 42,451 |
| Astronomy Quiz | 0 | - | 4.89 | 81,700 |
| Countries by National Anthem | 0 | - | 4.92 | 71,025 |
| Title in the Lyrics Quiz #1 | 0 | - | 4.31 | 220,657 |
| Title in the Lyrics Quiz #3 | 0 | - | 4.13 | 122,826 |
| Title in the Lyrics Quiz #4 | 0 | - | 4.34 | 140,914 |
| Title in the Lyrics Quiz #5 | 0 | - | 4.15 | 102,161 |
| Title in the Lyrics Quiz #6 | 0 | - | 4.35 | 94,014 |
| Title in the Lyrics Quiz #7 | 0 | - | 4.38 | 95,229 |
| Title in the Lyrics Quiz #10 | 0 | - | 4.06 | 55,780 |
| Songs with Animals in the Title #2 | 0 | - | 3.90 | 27,879 |
| Song Title Vocabulary | 0 | - | 4.35 | 62,212 |
| Books with Names in the Title #1 | 0 | - | 4.26 | 70,291 |
| Word Scramble - Countries | 0 | - | 4.86 | 2,087,956 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 163,161 |
| Solve the Secret Country #2 | 0 | - | 4.85 | 116,108 |
| Anagram Chain - Countries | 0 | - | 4.99 | 115,227 |
| 7 Deadly Sins | 0 | - | 4.88 | 394,893 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 446,764 |
| Countries with Four Letters | 0 | - | 4.99 | 418,519 |
| Random Capital to Country | 0 | - | 4.99 | 2,577,950 |
| Random Country to Capital | 0 | - | 4.98 | 911,584 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,539 |
| Countries but all Vowels are Changed to O | 0 | - | 4.92 | 67,836 |
| Solve the Secret Country #3 | 0 | - | 4.98 | 63,189 |
| Scientific Names | 0 | - | 4.32 | 78,163 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,042 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,904 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.72 | 187,293 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,196 |
| Body Part Cliches | 0 | - | 4.43 | 123,053 |
| Bones of the Human Body | 0 | - | 4.56 | 36,717 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,114 |
| Title in the Lyrics - Disney Songs | 0 | - | 4.36 | 128,923 |
| The Michael Jackson Quiz | 0 | - | 4.21 | 27,973 |
| Countries by Languages in 90 Seconds | 0 | - | 4.93 | 711,472 |
| Islands by Country #1 | 0 | - | 4.87 | 174,482 |
| Regions of Countries #1 | 0 | - | 4.97 | 158,921 |
| Regions of Countries #2 | 0 | - | 4.95 | 123,283 |
| Regions of Countries #3 | 0 | - | 4.84 | 90,332 |
| Countries by Emojis | 0 | - | 4.99 | 236,169 |
| Top Five Countries By Category #2 | 0 | - | 4.93 | 198,318 |
| Top Five Countries By Category #3 | 0 | - | 4.82 | 169,433 |
| Countries With One Word And Two O's | 0 | - | 4.94 | 55,106 |
| Country Chain | 0 | - | 4.96 | 215,722 |
| Can You Name These 50 Random Countries? | 0 | - | 4.98 | 213,800 |
| Capital Cities Chain | 0 | - | 4.84 | 81,917 |
| Name a Valid Capital #1 | 0 | - | 4.96 | 89,994 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 317,010 |
| Name a Valid Country #3 | 0 | - | 4.99 | 259,806 |
| Name a Valid Country #1 | 0 | - | 4.99 | 283,487 |
| Name a Valid Country #2 | 0 | - | 4.98 | 246,391 |
| Name a Valid Country #4 | 0 | - | 4.97 | 251,569 |
| Name a Valid Country #5 | 0 | - | 4.99 | 189,794 |
| Name a Valid Country #6 | 0 | - | 4.95 | 126,399 |
| Name a Valid Country #7 | 0 | - | 4.91 | 126,485 |
| Name a Valid Country #8 | 0 | - | 4.85 | 96,023 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,239 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,097 |
| Science General Knowledge #1 | 0 | - | 4.54 | 163,456 |
| Science General Knowledge #2 | 0 | - | 4.47 | 116,627 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,194 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,258 |
| Word Chain - Science | 0 | - | 4.59 | 54,393 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,355 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,340 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 150,706 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,643 |
| Environmental Issues | 0 | - | 4.54 | 26,720 |
| Musical Instruments by Picture #2 | 0 | - | 4.24 | 46,683 |
| Title in the Lyrics - Hair Band Songs | 0 | - | 4.02 | 21,642 |
| Title in the Lyrics - Musicals | 0 | - | 4.28 | 54,445 |
| Title in the Lyrics - Names | 0 | - | 3.94 | 41,192 |
| Divided World City Name Puzzle #1 | 0 | - | 4.88 | 48,096 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,152 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 47,673 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 95,630 |
| Movies with Colors in the Title #1 | 0 | - | 3.84 | 36,097 |
| Movies with Colors in the Title #2 | 0 | - | 3.47 | 54,332 |
| Books with Food in the Title | 0 | - | 3.93 | 39,594 |
| Books with Animals in the Title #2 | 0 | - | 4.23 | 17,974 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.42 | 319,333 |
| UNESCO World Heritage Sites to Country | 0 | - | 4.97 | 102,598 |
| The Eleven Colors | 0 | - | 4.73 | 233,301 |
| Marvel Cinematic Universe - All Movies | 0 | - | 4.89 | 332,750 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,001 |
| Five Biggest Immigrant Groups by Country #1 | 0 | - | 4.97 | 179,441 |
| Five Biggest Immigrant Groups by Country #2 | 0 | - | 4.91 | 88,450 |
| Top Five Countries By Fruit Production | 0 | - | 4.96 | 77,214 |
| The Only Country ... | 0 | - | 4.91 | 79,880 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,341 |
| Random Countries by Borders | 0 | - | 4.99 | 81,672 |
| Top Five Countries by Random Categories | 0 | - | 4.95 | 137,046 |
| Random Name a Valid Country | 0 | - | 4.99 | 203,217 |
| Random World Capitals on a Map | 0 | - | 4.93 | 133,212 |
| Empty World Map without 20 Random Countries | 0 | - | 4.94 | 134,804 |
| World Map with 10 Random Extra Borders | 0 | - | 4.95 | 378,554 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,205 |
| Fruits by Picture | 0 | - | 4.20 | 804,625 |
| Countries with the Most McDonald's Locations | 0 | - | 4.83 | 110,338 |
| Biggest Countries with No McDonald's | 0 | - | 4.84 | 88,849 |
| World Countries by 10 Category Elimination #1 | 0 | - | 4.97 | 121,434 |
| Capital Cities in Squares of an Empty World Map | 0 | - | 4.99 | 88,659 |
| Category Elimination - Countries #2 | 0 | - | 4.98 | 233,568 |
| Category Elimination - Countries #3 | 0 | - | 4.99 | 222,820 |
| Category Elimination - Countries #4 | 0 | - | 4.99 | 190,327 |
| Category Elimination - Capital Cities #1 | 0 | - | 4.87 | 131,511 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,536 |
| Category Elimination - Capital Cities #2 | 0 | - | 4.89 | 79,525 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,169 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 108,719 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,095 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 95,567 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,791 |
| Name a Valid Island Country | 0 | - | 4.96 | 114,052 |
| Groups of Two - Science | 0 | - | 4.26 | 48,143 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,383 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,658 |
| Science Decoder | 0 | - | 4.52 | 28,650 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,064 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,157 |
| Elements by Picture | 0 | - | 4.28 | 69,549 |
| Medical Acronyms | 0 | - | 4.43 | 96,173 |
| Medical Vocabulary | 0 | - | 4.54 | 58,530 |
| Musicians Who Died Young | 0 | - | 4.39 | 107,460 |
| 2000s Music Trivia #1 | 0 | - | 4.04 | 66,699 |
| 2000s Music Trivia #2 | 0 | - | 4.19 | 52,560 |
| 1990s Music Trivia #1 | 0 | - | 4.28 | 50,578 |
| 1990s Music Trivia #2 | 0 | - | 4.06 | 35,543 |
| #1 Hits of the 1980s | 0 | - | 4.86 | 147,533 |
| Twelve Days of Christmas | 0 | - | 4.45 | 145,591 |
| Rudolph the Red-Nosed Reindeer | 0 | - | 4.53 | 76,004 |
| Songs From Movies | 0 | - | 4.35 | 65,525 |
| Historical Middle Names | 0 | - | 4.16 | 35,383 |
| People with Food Names | 0 | - | 4.10 | 60,484 |
| First Names of Historical Figures #2 | 0 | - | 4.32 | 40,237 |
| First Names of Historical Figures #1 | 0 | - | 4.39 | 228,598 |
| Random Nicknames #1 | 0 | - | 4.10 | 34,721 |
| Birth Names | 0 | - | 4.30 | 61,423 |
| Word Scramble - Cities #1 | 0 | - | 4.50 | 98,974 |
| Literary Quotes #1 | 0 | - | 4.49 | 33,378 |
| Top 100 Movie Quotes | 0 | - | 4.44 | 67,337 |
| Star Wars Quotes | 0 | - | 4.84 | 173,431 |
| Quotes from Historical Figures #1 | 0 | - | 4.50 | 87,111 |
| Santa's Reindeer | 0 | - | 4.47 | 191,623 |
| Countries of the World - One Minute Sprint | 0 | - | 4.35 | 956,209 |
| Countries of Asia - One Minute Sprint | 0 | - | 4.41 | 273,118 |
| Countries by Borders in 90 Seconds with an Empty Map | 0 | - | 4.90 | 277,390 |
| Foods by Country of Origin #1 | 0 | - | 4.41 | 334,963 |
| Musical Acts by Country #1 | 0 | - | 4.45 | 78,841 |
| Places with Colors in the Name | 0 | - | 4.27 | 72,171 |
| What Color is It - Multiple Choice | 0 | - | 4.47 | 43,762 |
| Cocktail Shopping List | 0 | - | 4.43 | 44,395 |
| Largest World Cities With Five Letters | 0 | - | 4.52 | 66,426 |
| Word Scramble - European Countries | 0 | - | 4.70 | 140,987 |
| Word Scramble - Asian Countries | 0 | - | 4.49 | 108,170 |
| Random Countries with Letters Missing | 0 | - | 4.51 | 93,421 |
| Capitals in Random Squares of the World Map | 0 | - | 4.92 | 74,907 |
| Random Countries Hidden in the World Map | 0 | - | 4.81 | 111,681 |
| Christmas Decoder | 0 | - | 4.42 | 49,363 |
| Cities Chain #2 | 0 | - | 4.42 | 56,169 |
