| Random Symbol to Element | 0 | - | 4.88 | 92,212 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,090,687 |
| 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 | 155,334 |
| First Names of Scientists | 0 | - | 4.50 | 56,457 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,220 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,220,346 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,826 |
| Periodic Table Elements A-Z | 0 | - | 4.78 | 102,191 |
| Name a Valid Element | 0 | - | 4.64 | 69,571 |
| Birthstones by Month | 0 | - | 4.41 | 80,480 |
| Elements by Symbol | 0 | - | 4.92 | 195,504 |
| Speed Symbol by Element | 0 | - | 4.91 | 103,623 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,447 |
| Noble Gases | 0 | - | 4.89 | 77,448 |
| Elements that are Gases at Room Temperature | 0 | - | 4.85 | 64,046 |
| Periodic Table Symbols | 0 | - | 4.97 | 70,906 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 80,868 |
| Name the Virus | 0 | - | 4.86 | 76,251 |
| Songs with Love in the Title | 0 | - | 4.14 | 18,715 |
| Songs by Picture Quiz #1 | 0 | - | 4.68 | 65,362 |
| Songs by Picture Quiz #2 | 0 | - | 4.41 | 58,408 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,701 |
| Category Elimination - Elements | 0 | - | 4.62 | 53,232 |
| Astronomy Decoder | 0 | - | 4.50 | 37,843 |
| Title in the Lyrics Quiz #8 | 0 | - | 4.52 | 112,119 |
| Title in the Lyrics Quiz #9 | 0 | - | 4.47 | 101,921 |
| Books with Names in the Title #2 | 0 | - | 4.42 | 54,458 |
| Citrus Fruits | 0 | - | 3.65 | 41,949 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,584 |
| Elemental Words | 0 | - | 4.96 | 51,986 |
| Metals of Antiquity | 0 | - | 4.94 | 92,904 |
| Pasta... or Composer? | 0 | - | 4.63 | 26,530 |
| Songs with Food in the Title | 0 | - | 4.26 | 42,407 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,587,767 |
| Books with Animals in the Title #1 | 0 | - | 4.41 | 74,292 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 79,831 |
| Famous Scientists | 0 | - | 4.57 | 42,451 |
| Astronomy Quiz | 0 | - | 4.89 | 81,688 |
| Countries by National Anthem | 0 | - | 4.92 | 71,024 |
| Title in the Lyrics Quiz #1 | 0 | - | 4.31 | 220,648 |
| Title in the Lyrics Quiz #3 | 0 | - | 4.13 | 122,819 |
| Title in the Lyrics Quiz #4 | 0 | - | 4.34 | 140,907 |
| Title in the Lyrics Quiz #5 | 0 | - | 4.15 | 102,152 |
| Title in the Lyrics Quiz #6 | 0 | - | 4.35 | 94,010 |
| Title in the Lyrics Quiz #7 | 0 | - | 4.38 | 95,224 |
| Title in the Lyrics Quiz #10 | 0 | - | 4.06 | 55,776 |
| 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 | 2,087,909 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 163,147 |
| Solve the Secret Country #2 | 0 | - | 4.85 | 116,099 |
| Anagram Chain - Countries | 0 | - | 4.99 | 115,221 |
| 7 Deadly Sins | 0 | - | 4.88 | 394,874 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 446,758 |
| Countries with Four Letters | 0 | - | 4.99 | 418,503 |
| Random Capital to Country | 0 | - | 4.99 | 2,577,910 |
| Random Country to Capital | 0 | - | 4.98 | 911,552 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,536 |
| Countries but all Vowels are Changed to O | 0 | - | 4.92 | 67,828 |
| Solve the Secret Country #3 | 0 | - | 4.98 | 63,181 |
| Scientific Names | 0 | - | 4.32 | 78,162 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 86,040 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,904 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.72 | 187,291 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,194 |
| Body Part Cliches | 0 | - | 4.43 | 123,050 |
| Bones of the Human Body | 0 | - | 4.56 | 36,514 |
| Medical Conditions Quiz | 0 | - | 4.78 | 123,113 |
| Title in the Lyrics - Disney Songs | 0 | - | 4.36 | 128,921 |
| The Michael Jackson Quiz | 0 | - | 4.21 | 27,973 |
| Countries by Languages in 90 Seconds | 0 | - | 4.93 | 711,453 |
| Islands by Country #1 | 0 | - | 4.87 | 174,479 |
| Regions of Countries #1 | 0 | - | 4.97 | 158,915 |
| Regions of Countries #2 | 0 | - | 4.95 | 123,280 |
| Regions of Countries #3 | 0 | - | 4.84 | 90,330 |
| Countries by Emojis | 0 | - | 4.99 | 236,155 |
| Top Five Countries By Category #2 | 0 | - | 4.93 | 198,313 |
| Top Five Countries By Category #3 | 0 | - | 4.82 | 169,429 |
| Countries With One Word And Two O's | 0 | - | 4.94 | 55,105 |
| Country Chain | 0 | - | 4.96 | 215,717 |
| Can You Name These 50 Random Countries? | 0 | - | 4.98 | 213,789 |
| Capital Cities Chain | 0 | - | 4.84 | 81,912 |
| Name a Valid Capital #1 | 0 | - | 4.96 | 89,990 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 316,996 |
| Name a Valid Country #3 | 0 | - | 4.99 | 259,797 |
| Name a Valid Country #1 | 0 | - | 4.99 | 283,465 |
| Name a Valid Country #2 | 0 | - | 4.98 | 246,380 |
| Name a Valid Country #4 | 0 | - | 4.97 | 251,561 |
| Name a Valid Country #5 | 0 | - | 4.99 | 189,786 |
| Name a Valid Country #6 | 0 | - | 4.95 | 126,389 |
| Name a Valid Country #7 | 0 | - | 4.91 | 126,476 |
| Name a Valid Country #8 | 0 | - | 4.85 | 96,011 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,238 |
| Body Parts in History and Culture | 0 | - | 4.42 | 35,097 |
| Science General Knowledge #1 | 0 | - | 4.54 | 163,448 |
| Science General Knowledge #2 | 0 | - | 4.47 | 116,623 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,190 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,257 |
| Word Chain - Science | 0 | - | 4.59 | 54,393 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,353 |
| Science Multiple Choice #2 | 0 | - | 4.37 | 36,338 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 150,697 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,639 |
| Environmental Issues | 0 | - | 4.54 | 26,720 |
| Musical Instruments by Picture #2 | 0 | - | 4.24 | 46,680 |
| Title in the Lyrics - Hair Band Songs | 0 | - | 4.02 | 21,642 |
| Title in the Lyrics - Musicals | 0 | - | 4.28 | 54,444 |
| Title in the Lyrics - Names | 0 | - | 3.94 | 41,192 |
| Divided World City Name Puzzle #1 | 0 | - | 4.88 | 48,094 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,146 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 47,672 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 95,625 |
| Movies with Colors in the Title #1 | 0 | - | 3.84 | 36,096 |
| 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 | 319,330 |
| UNESCO World Heritage Sites to Country | 0 | - | 4.97 | 102,595 |
| The Eleven Colors | 0 | - | 4.73 | 233,294 |
| Marvel Cinematic Universe - All Movies | 0 | - | 4.89 | 332,732 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 49,000 |
| Five Biggest Immigrant Groups by Country #1 | 0 | - | 4.97 | 179,434 |
| Five Biggest Immigrant Groups by Country #2 | 0 | - | 4.91 | 88,447 |
| Top Five Countries By Fruit Production | 0 | - | 4.96 | 77,207 |
| The Only Country ... | 0 | - | 4.91 | 79,871 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,336 |
| Random Countries by Borders | 0 | - | 4.99 | 81,670 |
| Top Five Countries by Random Categories | 0 | - | 4.95 | 137,031 |
| Random Name a Valid Country | 0 | - | 4.99 | 203,214 |
| Random World Capitals on a Map | 0 | - | 4.93 | 133,209 |
| Empty World Map without 20 Random Countries | 0 | - | 4.94 | 134,800 |
| World Map with 10 Random Extra Borders | 0 | - | 4.95 | 378,527 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 274,199 |
| Fruits by Picture | 0 | - | 4.20 | 804,620 |
| Countries with the Most McDonald's Locations | 0 | - | 4.83 | 110,336 |
| Biggest Countries with No McDonald's | 0 | - | 4.84 | 88,847 |
| World Countries by 10 Category Elimination #1 | 0 | - | 4.97 | 121,430 |
| Capital Cities in Squares of an Empty World Map | 0 | - | 4.99 | 88,656 |
| Category Elimination - Countries #2 | 0 | - | 4.98 | 233,563 |
| Category Elimination - Countries #3 | 0 | - | 4.99 | 222,811 |
| Category Elimination - Countries #4 | 0 | - | 4.99 | 190,320 |
| Category Elimination - Capital Cities #1 | 0 | - | 4.87 | 131,507 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,528 |
| Category Elimination - Capital Cities #2 | 0 | - | 4.89 | 79,525 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 165,162 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 108,717 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 91,094 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 95,562 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,785 |
| Name a Valid Island Country | 0 | - | 4.96 | 114,049 |
| Groups of Two - Science | 0 | - | 4.26 | 48,141 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,382 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,657 |
| Science Decoder | 0 | - | 4.52 | 28,650 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,064 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,156 |
| Elements by Picture | 0 | - | 4.28 | 69,548 |
| Medical Acronyms | 0 | - | 4.43 | 96,173 |
| Medical Vocabulary | 0 | - | 4.54 | 58,529 |
| Musicians Who Died Young | 0 | - | 4.39 | 107,458 |
| 2000s Music Trivia #1 | 0 | - | 4.04 | 66,698 |
| 2000s Music Trivia #2 | 0 | - | 4.19 | 52,559 |
| 1990s Music Trivia #1 | 0 | - | 4.28 | 50,577 |
| 1990s Music Trivia #2 | 0 | - | 4.06 | 35,542 |
| #1 Hits of the 1980s | 0 | - | 4.86 | 147,529 |
| Twelve Days of Christmas | 0 | - | 4.45 | 145,588 |
| Rudolph the Red-Nosed Reindeer | 0 | - | 4.53 | 76,000 |
| Songs From Movies | 0 | - | 4.35 | 65,522 |
| Historical Middle Names | 0 | - | 4.16 | 35,382 |
| People with Food Names | 0 | - | 4.10 | 60,480 |
| First Names of Historical Figures #2 | 0 | - | 4.32 | 40,237 |
| First Names of Historical Figures #1 | 0 | - | 4.39 | 228,596 |
| Random Nicknames #1 | 0 | - | 4.10 | 34,721 |
| Birth Names | 0 | - | 4.30 | 61,423 |
| Word Scramble - Cities #1 | 0 | - | 4.50 | 98,973 |
| Literary Quotes #1 | 0 | - | 4.49 | 33,378 |
| Top 100 Movie Quotes | 0 | - | 4.44 | 67,336 |
| Star Wars Quotes | 0 | - | 4.84 | 173,427 |
| Quotes from Historical Figures #1 | 0 | - | 4.50 | 87,111 |
| Santa's Reindeer | 0 | - | 4.47 | 191,616 |
| Countries of the World - One Minute Sprint | 0 | - | 4.35 | 956,180 |
| Countries of Asia - One Minute Sprint | 0 | - | 4.41 | 273,116 |
| Countries by Borders in 90 Seconds with an Empty Map | 0 | - | 4.90 | 277,389 |
| Foods by Country of Origin #1 | 0 | - | 4.41 | 334,917 |
| Musical Acts by Country #1 | 0 | - | 4.45 | 78,841 |
| Places with Colors in the Name | 0 | - | 4.27 | 72,170 |
| What Color is It - Multiple Choice | 0 | - | 4.47 | 43,760 |
| Cocktail Shopping List | 0 | - | 4.43 | 44,394 |
| Largest World Cities With Five Letters | 0 | - | 4.52 | 66,426 |
| Word Scramble - European Countries | 0 | - | 4.70 | 140,985 |
| Word Scramble - Asian Countries | 0 | - | 4.49 | 108,167 |
| Random Countries with Letters Missing | 0 | - | 4.51 | 93,419 |
| Capitals in Random Squares of the World Map | 0 | - | 4.92 | 74,905 |
| Random Countries Hidden in the World Map | 0 | - | 4.81 | 111,677 |
| Christmas Decoder | 0 | - | 4.42 | 49,363 |
| Cities Chain #2 | 0 | - | 4.42 | 56,167 |
