| Random Symbol to Element | 0 | - | 4.88 | 92,202 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,090,536 |
| Songs with Colors in the Title | 0 | - | 3.88 | 41,499 |
| Songs with Countries in the Title | 0 | - | 3.85 | 44,460 |
| Songs with Animals in the Title #1 | 0 | - | 4.36 | 129,007 |
| International Scientific Units | 0 | - | 4.95 | 155,305 |
| First Names of Scientists | 0 | - | 4.50 | 56,448 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,195 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,219,792 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,823 |
| Periodic Table Elements A-Z | 0 | - | 4.78 | 102,181 |
| Name a Valid Element | 0 | - | 4.64 | 69,561 |
| Birthstones by Month | 0 | - | 4.41 | 80,478 |
| Elements by Symbol | 0 | - | 4.92 | 195,463 |
| Speed Symbol by Element | 0 | - | 4.91 | 103,586 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,433 |
| Noble Gases | 0 | - | 4.89 | 77,427 |
| Elements that are Gases at Room Temperature | 0 | - | 4.85 | 64,035 |
| Periodic Table Symbols | 0 | - | 4.97 | 70,881 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 80,852 |
| Name the Virus | 0 | - | 4.86 | 76,231 |
| Songs with Love in the Title | 0 | - | 4.14 | 18,714 |
| Songs by Picture Quiz #1 | 0 | - | 4.68 | 65,348 |
| Songs by Picture Quiz #2 | 0 | - | 4.41 | 58,396 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,699 |
| Category Elimination - Elements | 0 | - | 4.62 | 53,224 |
| Astronomy Decoder | 0 | - | 4.50 | 37,837 |
| Title in the Lyrics Quiz #8 | 0 | - | 4.52 | 112,100 |
| Title in the Lyrics Quiz #9 | 0 | - | 4.47 | 101,912 |
| Books with Names in the Title #2 | 0 | - | 4.42 | 54,456 |
| Citrus Fruits | 0 | - | 3.65 | 41,946 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,573 |
| Elemental Words | 0 | - | 4.96 | 51,980 |
| Metals of Antiquity | 0 | - | 4.94 | 92,889 |
| Pasta... or Composer? | 0 | - | 4.63 | 26,524 |
| Songs with Food in the Title | 0 | - | 4.26 | 42,400 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,586,949 |
| Books with Animals in the Title #1 | 0 | - | 4.41 | 74,282 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 79,816 |
| Famous Scientists | 0 | - | 4.57 | 42,444 |
| Astronomy Quiz | 0 | - | 4.89 | 81,671 |
| Countries by National Anthem | 0 | - | 4.92 | 71,013 |
| Title in the Lyrics Quiz #1 | 0 | - | 4.31 | 220,618 |
| Title in the Lyrics Quiz #3 | 0 | - | 4.13 | 122,798 |
| Title in the Lyrics Quiz #4 | 0 | - | 4.34 | 140,887 |
| Title in the Lyrics Quiz #5 | 0 | - | 4.15 | 102,138 |
| Title in the Lyrics Quiz #6 | 0 | - | 4.35 | 93,994 |
| Title in the Lyrics Quiz #7 | 0 | - | 4.38 | 95,207 |
| Title in the Lyrics Quiz #10 | 0 | - | 4.06 | 55,769 |
| Songs with Animals in the Title #2 | 0 | - | 3.90 | 27,875 |
| Song Title Vocabulary | 0 | - | 4.35 | 62,209 |
| Books with Names in the Title #1 | 0 | - | 4.26 | 70,287 |
| Word Scramble - Countries | 0 | - | 4.86 | 2,087,679 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 163,106 |
| Solve the Secret Country #2 | 0 | - | 4.85 | 116,078 |
| Anagram Chain - Countries | 0 | - | 4.99 | 115,204 |
| 7 Deadly Sins | 0 | - | 4.88 | 394,783 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 446,722 |
| Countries with Four Letters | 0 | - | 4.99 | 418,440 |
| Random Capital to Country | 0 | - | 4.99 | 2,577,678 |
| Random Country to Capital | 0 | - | 4.98 | 911,435 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,531 |
| Countries but all Vowels are Changed to O | 0 | - | 4.92 | 67,798 |
| Solve the Secret Country #3 | 0 | - | 4.98 | 63,169 |
| Scientific Names | 0 | - | 4.32 | 78,151 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,028 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,902 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.72 | 187,229 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,187 |
| Body Part Cliches | 0 | - | 4.43 | 123,034 |
| Bones of the Human Body | 0 | - | 4.56 | 35,575 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,095 |
| Title in the Lyrics - Disney Songs | 0 | - | 4.36 | 128,914 |
| The Michael Jackson Quiz | 0 | - | 4.21 | 27,970 |
| Countries by Languages in 90 Seconds | 0 | - | 4.93 | 711,305 |
| Islands by Country #1 | 0 | - | 4.87 | 174,466 |
| Regions of Countries #1 | 0 | - | 4.97 | 158,900 |
| Regions of Countries #2 | 0 | - | 4.95 | 123,265 |
| Regions of Countries #3 | 0 | - | 4.84 | 90,324 |
| Countries by Emojis | 0 | - | 4.99 | 236,102 |
| Top Five Countries By Category #2 | 0 | - | 4.93 | 198,284 |
| Top Five Countries By Category #3 | 0 | - | 4.82 | 169,406 |
| Countries With One Word And Two O's | 0 | - | 4.94 | 55,093 |
| Country Chain | 0 | - | 4.96 | 215,692 |
| Can You Name These 50 Random Countries? | 0 | - | 4.98 | 213,737 |
| Capital Cities Chain | 0 | - | 4.84 | 81,899 |
| Name a Valid Capital #1 | 0 | - | 4.96 | 89,975 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 316,941 |
| Name a Valid Country #3 | 0 | - | 4.99 | 259,762 |
| Name a Valid Country #1 | 0 | - | 4.99 | 283,374 |
| Name a Valid Country #2 | 0 | - | 4.98 | 246,341 |
| Name a Valid Country #4 | 0 | - | 4.97 | 251,516 |
| Name a Valid Country #5 | 0 | - | 4.99 | 189,753 |
| Name a Valid Country #6 | 0 | - | 4.95 | 126,359 |
| Name a Valid Country #7 | 0 | - | 4.91 | 126,438 |
| Name a Valid Country #8 | 0 | - | 4.85 | 95,983 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,237 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,091 |
| Science General Knowledge #1 | 0 | - | 4.54 | 163,426 |
| Science General Knowledge #2 | 0 | - | 4.47 | 116,608 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,175 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,253 |
| Word Chain - Science | 0 | - | 4.59 | 54,384 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,349 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,331 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 150,651 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,626 |
| Environmental Issues | 0 | - | 4.54 | 26,718 |
| Musical Instruments by Picture #2 | 0 | - | 4.24 | 46,667 |
| Title in the Lyrics - Hair Band Songs | 0 | - | 4.02 | 21,640 |
| Title in the Lyrics - Musicals | 0 | - | 4.28 | 54,429 |
| Title in the Lyrics - Names | 0 | - | 3.94 | 41,190 |
| Divided World City Name Puzzle #1 | 0 | - | 4.88 | 48,087 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,126 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 47,652 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 95,613 |
| Movies with Colors in the Title #1 | 0 | - | 3.84 | 36,093 |
| Movies with Colors in the Title #2 | 0 | - | 3.47 | 54,329 |
| Books with Food in the Title | 0 | - | 3.93 | 39,591 |
| Books with Animals in the Title #2 | 0 | - | 4.23 | 17,973 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.42 | 319,297 |
| UNESCO World Heritage Sites to Country | 0 | - | 4.97 | 102,588 |
| The Eleven Colors | 0 | - | 4.73 | 233,267 |
| Marvel Cinematic Universe - All Movies | 0 | - | 4.89 | 332,595 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 48,994 |
| Five Biggest Immigrant Groups by Country #1 | 0 | - | 4.97 | 179,416 |
| Five Biggest Immigrant Groups by Country #2 | 0 | - | 4.91 | 88,436 |
| Top Five Countries By Fruit Production | 0 | - | 4.96 | 77,169 |
| The Only Country ... | 0 | - | 4.91 | 79,845 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,321 |
| Random Countries by Borders | 0 | - | 4.99 | 81,657 |
| Top Five Countries by Random Categories | 0 | - | 4.95 | 136,975 |
| Random Name a Valid Country | 0 | - | 4.99 | 203,181 |
| Random World Capitals on a Map | 0 | - | 4.93 | 133,149 |
| Empty World Map without 20 Random Countries | 0 | - | 4.94 | 134,754 |
| World Map with 10 Random Extra Borders | 0 | - | 4.95 | 378,444 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,164 |
| Fruits by Picture | 0 | - | 4.20 | 804,558 |
| Countries with the Most McDonald's Locations | 0 | - | 4.83 | 110,326 |
| Biggest Countries with No McDonald's | 0 | - | 4.84 | 88,835 |
| World Countries by 10 Category Elimination #1 | 0 | - | 4.97 | 121,406 |
| Capital Cities in Squares of an Empty World Map | 0 | - | 4.99 | 88,645 |
| Category Elimination - Countries #2 | 0 | - | 4.98 | 233,527 |
| Category Elimination - Countries #3 | 0 | - | 4.99 | 222,762 |
| Category Elimination - Countries #4 | 0 | - | 4.99 | 190,281 |
| Category Elimination - Capital Cities #1 | 0 | - | 4.87 | 131,487 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,473 |
| Category Elimination - Capital Cities #2 | 0 | - | 4.89 | 79,511 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,129 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 108,694 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,080 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 95,544 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,758 |
| Name a Valid Island Country | 0 | - | 4.96 | 114,035 |
| Groups of Two - Science | 0 | - | 4.26 | 48,135 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,378 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,655 |
| Science Decoder | 0 | - | 4.52 | 28,649 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,062 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,155 |
| Elements by Picture | 0 | - | 4.28 | 69,535 |
| Medical Acronyms | 0 | - | 4.43 | 96,166 |
| Medical Vocabulary | 0 | - | 4.54 | 58,520 |
| Musicians Who Died Young | 0 | - | 4.39 | 107,440 |
| 2000s Music Trivia #1 | 0 | - | 4.04 | 66,691 |
| 2000s Music Trivia #2 | 0 | - | 4.19 | 52,554 |
| 1990s Music Trivia #1 | 0 | - | 4.28 | 50,566 |
| 1990s Music Trivia #2 | 0 | - | 4.06 | 35,536 |
| #1 Hits of the 1980s | 0 | - | 4.86 | 147,516 |
| Twelve Days of Christmas | 0 | - | 4.45 | 145,582 |
| Rudolph the Red-Nosed Reindeer | 0 | - | 4.53 | 75,995 |
| Songs From Movies | 0 | - | 4.35 | 65,505 |
| Historical Middle Names | 0 | - | 4.16 | 35,377 |
| People with Food Names | 0 | - | 4.10 | 60,467 |
| First Names of Historical Figures #2 | 0 | - | 4.32 | 40,229 |
| First Names of Historical Figures #1 | 0 | - | 4.39 | 228,584 |
| Random Nicknames #1 | 0 | - | 4.10 | 34,719 |
| Birth Names | 0 | - | 4.30 | 61,422 |
| Word Scramble - Cities #1 | 0 | - | 4.50 | 98,965 |
| Literary Quotes #1 | 0 | - | 4.49 | 33,373 |
| Top 100 Movie Quotes | 0 | - | 4.44 | 67,327 |
| Star Wars Quotes | 0 | - | 4.84 | 173,397 |
| Quotes from Historical Figures #1 | 0 | - | 4.50 | 87,109 |
| Santa's Reindeer | 0 | - | 4.47 | 191,581 |
| Countries of the World - One Minute Sprint | 0 | - | 4.35 | 956,059 |
| Countries of Asia - One Minute Sprint | 0 | - | 4.41 | 273,093 |
| Countries by Borders in 90 Seconds with an Empty Map | 0 | - | 4.90 | 277,356 |
| Foods by Country of Origin #1 | 0 | - | 4.41 | 334,737 |
| Musical Acts by Country #1 | 0 | - | 4.45 | 78,835 |
| Places with Colors in the Name | 0 | - | 4.27 | 72,170 |
| What Color is It - Multiple Choice | 0 | - | 4.47 | 43,750 |
| Cocktail Shopping List | 0 | - | 4.43 | 44,393 |
| Largest World Cities With Five Letters | 0 | - | 4.52 | 66,419 |
| Word Scramble - European Countries | 0 | - | 4.70 | 140,975 |
| Word Scramble - Asian Countries | 0 | - | 4.49 | 108,142 |
| Random Countries with Letters Missing | 0 | - | 4.51 | 93,349 |
| Capitals in Random Squares of the World Map | 0 | - | 4.92 | 74,895 |
| Random Countries Hidden in the World Map | 0 | - | 4.81 | 111,640 |
| Christmas Decoder | 0 | - | 4.42 | 49,359 |
| Cities Chain #2 | 0 | - | 4.42 | 56,165 |
