| Random Symbol to Element | 0 | - | 4.88 | 93,486 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,099,942 |
| Songs with Colors in the Title | 0 | - | 3.88 | 41,682 |
| Songs with Countries in the Title | 0 | - | 3.81 | 44,602 |
| Songs with Animals in the Title #1 | 0 | - | 4.36 | 129,522 |
| International Scientific Units | 0 | - | 4.95 | 157,541 |
| First Names of Scientists | 0 | - | 4.51 | 57,061 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 63,063 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,251,632 |
| Answers are Elements #2 | 0 | - | 4.43 | 55,124 |
| Periodic Table Elements A-Z | 0 | - | 4.77 | 103,182 |
| Name a Valid Element | 0 | - | 4.67 | 70,224 |
| Birthstones by Month | 0 | - | 4.42 | 80,792 |
| Elements by Symbol | 0 | - | 4.92 | 197,925 |
| Speed Symbol by Element | 0 | - | 4.90 | 105,113 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 94,464 |
| Noble Gases | 0 | - | 4.89 | 78,523 |
| Elements that are Gases at Room Temperature | 0 | - | 4.86 | 64,821 |
| Periodic Table Symbols | 0 | - | 4.97 | 72,887 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 82,026 |
| Name the Virus | 0 | - | 4.87 | 76,937 |
| Songs with Love in the Title | 0 | - | 4.14 | 18,830 |
| Songs by Picture Quiz #1 | 0 | - | 4.68 | 66,269 |
| Songs by Picture Quiz #2 | 0 | - | 4.42 | 59,092 |
| Answers are Elements #1 | 0 | - | 4.29 | 52,899 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,902 |
| Astronomy Decoder | 0 | - | 4.48 | 38,136 |
| Title in the Lyrics #8 | 0 | - | 4.53 | 113,590 |
| Title in the Lyrics #9 | 0 | - | 4.47 | 102,865 |
| Books with Names in the Title #2 | 0 | - | 4.42 | 54,739 |
| Citrus Fruits | 0 | - | 3.64 | 42,105 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 54,129 |
| Elemental Words | 0 | - | 4.96 | 52,430 |
| Metals of Antiquity | 0 | - | 4.95 | 93,680 |
| Pasta... or Composer? | 0 | - | 4.63 | 26,766 |
| Songs with Food in the Title | 0 | - | 4.26 | 42,569 |
| Books with Animals in the Title #1 | 0 | - | 4.41 | 74,665 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,638,250 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 80,891 |
| Famous Scientists | 0 | - | 4.57 | 42,751 |
| Astronomy Quiz | 0 | - | 4.90 | 82,937 |
| Countries by National Anthem | 0 | - | 4.93 | 71,322 |
| Title in the Lyrics #1 | 0 | - | 4.32 | 223,091 |
| Title in the Lyrics #3 | 0 | - | 4.14 | 124,086 |
| Title in the Lyrics #4 | 0 | - | 4.34 | 142,583 |
| Title in the Lyrics #5 | 0 | - | 4.15 | 103,179 |
| Title in the Lyrics #6 | 0 | - | 4.35 | 95,047 |
| Title in the Lyrics #7 | 0 | - | 4.39 | 96,175 |
| Title in the Lyrics #10 | 0 | - | 4.06 | 56,475 |
| Songs with Animals in the Title #2 | 0 | - | 3.90 | 28,010 |
| Song Title Vocabulary | 0 | - | 4.35 | 62,505 |
| Countries but all Vowels are Changed to O | 0 | - | 4.91 | 70,225 |
| Books with Names in the Title #1 | 0 | - | 4.27 | 70,536 |
| Word Scramble - Countries | 0 | - | 4.87 | 2,107,519 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 166,803 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 119,285 |
| Anagram Chain - Countries | 0 | - | 4.98 | 117,005 |
| 7 Deadly Sins | 0 | - | 4.88 | 402,009 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 452,016 |
| Countries with Four Letters | 0 | - | 4.99 | 423,912 |
| Random Capital to Country | 0 | - | 4.99 | 2,596,347 |
| Random Country to Capital | 0 | - | 4.98 | 924,046 |
| Europe Geography Decoder | 0 | - | 4.86 | 70,162 |
| Name a Valid World City | 0 | - | 4.83 | 71,594 |
| Solve the Secret Country #3 | 0 | - | 4.98 | 65,111 |
| Scientific Names | 0 | - | 4.32 | 78,609 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,782 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 32,048 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.73 | 189,314 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,670 |
| Body Part Cliches | 0 | - | 4.44 | 123,582 |
| Bones of the Human Body | 0 | - | 4.51 | 43,198 |
| Medical Conditions Quiz | 0 | - | 4.78 | 124,666 |
| Title in the Lyrics - Disney Songs | 0 | - | 4.36 | 129,705 |
| The Michael Jackson Quiz | 0 | - | 4.23 | 28,780 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,456 |
| Islands by Country #1 | 0 | - | 4.90 | 175,679 |
| Regions of Countries #1 | 0 | - | 4.96 | 159,849 |
| Regions of Countries #2 | 0 | - | 4.95 | 124,212 |
| Regions of Countries #3 | 0 | - | 4.85 | 90,961 |
| Countries by Emojis | 0 | - | 4.99 | 240,755 |
| Top Five Countries By Category #2 | 0 | - | 4.93 | 201,331 |
| Top Five Countries By Category #3 | 0 | - | 4.83 | 183,671 |
| Countries With One Word And Two O's | 0 | - | 4.92 | 56,228 |
| Country Chain | 0 | - | 4.96 | 217,812 |
| Can You Name These 50 Random Countries? | 0 | - | 4.98 | 217,768 |
| Capital Cities Chain | 0 | - | 4.84 | 83,067 |
| Name a Valid Capital #1 | 0 | - | 4.96 | 91,214 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 322,242 |
| Name a Valid Country #3 | 0 | - | 4.99 | 263,957 |
| Name a Valid Country #1 | 0 | - | 4.99 | 291,951 |
| Name a Valid Country #2 | 0 | - | 4.98 | 251,837 |
| Name a Valid Country #4 | 0 | - | 4.97 | 256,986 |
| Name a Valid Country #5 | 0 | - | 4.99 | 207,959 |
| Name a Valid Country #6 | 0 | - | 4.94 | 130,184 |
| Name a Valid Country #7 | 0 | - | 4.91 | 129,929 |
| Name a Valid Country #8 | 0 | - | 4.86 | 99,285 |
| Countries by Languages in 90 Seconds | 0 | - | 4.93 | 732,333 |
| Body Parts in History and Culture | 0 | - | 4.43 | 35,386 |
| Science General Knowledge #1 | 0 | - | 4.54 | 166,572 |
| Science General Knowledge #2 | 0 | - | 4.48 | 119,278 |
| Science General Knowledge #3 | 0 | - | 4.56 | 109,216 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,821 |
| Word Chain - Science | 0 | - | 4.59 | 55,025 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,831 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,676 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 152,205 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 36,058 |
| Environmental Issues | 0 | - | 4.54 | 26,874 |
| Musical Instruments by Picture #2 | 0 | - | 4.24 | 47,185 |
| Title in the Lyrics - Hair Band Songs | 0 | - | 4.02 | 21,735 |
| Title in the Lyrics - Musicals | 0 | - | 4.28 | 54,896 |
| Title in the Lyrics - Names | 0 | - | 3.94 | 41,529 |
| Divided World City Name Puzzle #1 | 0 | - | 4.84 | 49,059 |
| Divided World City Name Puzzle #2 | 0 | - | 4.83 | 37,252 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 175,050 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 49,053 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 96,405 |
| Movies with Colors in the Title #1 | 0 | - | 3.84 | 36,206 |
| Movies with Colors in the Title #2 | 0 | - | 3.47 | 54,497 |
| Books with Food in the Title | 0 | - | 3.93 | 39,716 |
| Books with Animals in the Title #2 | 0 | - | 4.23 | 18,089 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.43 | 323,467 |
| UNESCO World Heritage Sites to Country | 0 | - | 4.97 | 103,319 |
| The Eleven Colors | 0 | - | 4.74 | 235,577 |
| Marvel Cinematic Universe - All Movies | 0 | - | 4.89 | 341,299 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,448 |
| Five Biggest Immigrant Groups by Country #1 | 0 | - | 4.97 | 181,320 |
| Five Biggest Immigrant Groups by Country #2 | 0 | - | 4.91 | 89,444 |
| Top Five Countries By Fruit Production | 0 | - | 4.96 | 80,451 |
| The Only Country ... | 0 | - | 4.91 | 81,536 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 121,375 |
| Random Countries by Borders | 0 | - | 4.99 | 82,765 |
| Top Five Countries by Random Categories | 0 | - | 4.95 | 140,487 |
| Random Name a Valid Country | 0 | - | 4.99 | 205,630 |
| Random World Capitals on a Map | 0 | - | 4.93 | 135,059 |
| Empty World Map without 20 Random Countries | 0 | - | 4.94 | 138,956 |
| World Map with 10 Random Extra Borders | 0 | - | 4.95 | 385,523 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 277,791 |
| Fruits by Picture | 0 | - | 4.19 | 808,301 |
| Countries with the Most McDonald's Locations | 0 | - | 4.83 | 110,916 |
| Biggest Countries with No McDonald's | 0 | - | 4.84 | 89,678 |
| World Countries by 10 Category Elimination #1 | 0 | - | 4.97 | 123,316 |
| Capital Cities in Squares of an Empty World Map | 0 | - | 4.99 | 89,603 |
| Category Elimination - Countries #2 | 0 | - | 4.98 | 237,041 |
| Category Elimination - Countries #3 | 0 | - | 4.99 | 226,110 |
| Category Elimination - Countries #4 | 0 | - | 4.99 | 192,882 |
| Category Elimination - Capital Cities #1 | 0 | - | 4.88 | 133,640 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 234,607 |
| Category Elimination - Capital Cities #2 | 0 | - | 4.89 | 80,930 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 168,038 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.86 | 110,524 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 92,756 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 97,261 |
| Category Elimination - European Geography #3 | 0 | - | 4.86 | 81,496 |
| Name a Valid Island Country | 0 | - | 4.96 | 115,233 |
| Groups of Two - Science | 0 | - | 4.26 | 48,395 |
| Science Vocabulary #1 | 0 | - | 4.34 | 72,032 |
| Science Vocabulary #3 | 0 | - | 4.31 | 52,114 |
| Science Decoder | 0 | - | 4.52 | 28,814 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,134 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,402 |
| Elements by Picture | 0 | - | 4.27 | 70,134 |
| Medical Acronyms | 0 | - | 4.43 | 97,066 |
| Medical Vocabulary | 0 | - | 4.54 | 59,312 |
| Musicians Who Died Young | 0 | - | 4.39 | 108,738 |
| 2000s Music Trivia #1 | 0 | - | 4.04 | 67,226 |
| 2000s Music Trivia #2 | 0 | - | 4.19 | 53,047 |
| 1990s Music Trivia #1 | 0 | - | 4.28 | 50,916 |
| 1990s Music Trivia #2 | 0 | - | 4.06 | 35,757 |
| 1970s Music Trivia | 0 | - | 4.29 | 31,692 |
| #1 Hits of the 1980s | 0 | - | 4.87 | 148,930 |
| Twelve Days of Christmas | 0 | - | 4.45 | 146,120 |
| Rudolph the Red-Nosed Reindeer | 0 | - | 4.53 | 76,363 |
| Songs From Movies | 0 | - | 4.36 | 66,165 |
| Movies by Soundtrack | 0 | - | 4.40 | 31,701 |
| Historical Middle Names | 0 | - | 4.16 | 35,961 |
| People with Food Names | 0 | - | 4.10 | 61,239 |
| First Names of Historical Figures #2 | 0 | - | 4.32 | 40,798 |
| First Names of Historical Figures #1 | 0 | - | 4.39 | 229,949 |
| Random Nicknames #1 | 0 | - | 4.11 | 34,894 |
| Also Known As #1 | 0 | - | 4.18 | 31,734 |
| Birth Names | 0 | - | 4.31 | 61,839 |
| Word Scramble - Cities #1 | 0 | - | 4.50 | 99,340 |
| Literary Quotes #1 | 0 | - | 4.49 | 33,677 |
| Top 100 Movie Quotes | 0 | - | 4.44 | 68,390 |
| Star Wars Quotes | 0 | - | 4.86 | 185,202 |
| Quotes from Historical Figures #1 | 0 | - | 4.50 | 87,596 |
| Santa's Reindeer | 0 | - | 4.47 | 193,887 |
| Countries of the World - One Minute Sprint | 0 | - | 4.36 | 979,835 |
| Countries of Asia - One Minute Sprint | 0 | - | 4.41 | 276,120 |
| Countries by Borders in 90 Seconds with an Empty Map | 0 | - | 4.90 | 280,159 |
| Foods by Country of Origin #1 | 0 | - | 4.41 | 337,312 |
| Musical Acts by Country #1 | 0 | - | 4.45 | 79,819 |
| Places with Colors in the Name | 0 | - | 4.27 | 72,387 |
| What Color is It - Multiple Choice | 0 | - | 4.47 | 44,216 |
| Cocktail Shopping List | 0 | - | 4.44 | 44,624 |
| Largest World Cities With Five Letters | 0 | - | 4.53 | 67,213 |
| Word Scramble - European Countries | 0 | - | 4.73 | 141,976 |
| Word Scramble - Asian Countries | 0 | - | 4.49 | 109,107 |
