| Random Symbol to Element | 0 | - | 4.88 | 92,109 |
| Planets of the Solar System Quiz | 0 | - | 4.93 | 1,089,709 |
| Songs with Colors in the Title | 0 | - | 3.88 | 41,485 |
| Songs with Countries in the Title | 0 | - | 3.85 | 44,444 |
| Songs with Animals in the Title #1 | 0 | - | 4.36 | 128,960 |
| International Scientific Units | 0 | - | 4.95 | 155,034 |
| First Names of Scientists | 0 | - | 4.50 | 56,421 |
| Electromagnetic Spectrum | 0 | - | 4.93 | 62,025 |
| Elements of the Periodic Table | 0 | - | 5.00 | 2,217,006 |
| Answers are Elements #2 | 0 | - | 4.43 | 54,802 |
| Periodic Table Elements A-Z | 0 | - | 4.78 | 102,105 |
| Name a Valid Element | 0 | - | 4.64 | 69,501 |
| Birthstones Quiz | 0 | - | 4.41 | 80,449 |
| Elements by Symbol Quiz | 0 | - | 4.92 | 195,218 |
| Speed Symbol by Element | 0 | - | 4.91 | 103,394 |
| Chemical Elements with Short Names | 0 | - | 4.81 | 93,329 |
| Noble Gases | 0 | - | 4.89 | 77,303 |
| Elements that are Gases at Room Temperature | 0 | - | 4.85 | 63,932 |
| Periodic Table Symbols | 0 | - | 4.97 | 70,716 |
| Elements with One-Letter Symbols | 0 | - | 4.83 | 80,716 |
| Name the Virus | 0 | - | 4.86 | 76,159 |
| Songs with Love in the Title | 0 | - | 4.14 | 18,705 |
| Songs by Picture Quiz #1 | 0 | - | 4.68 | 65,251 |
| Songs by Picture Quiz #2 | 0 | - | 4.41 | 58,332 |
| Answers are Elements #1 | 0 | - | 4.30 | 52,681 |
| Category Elimination - Elements | 0 | - | 4.61 | 53,165 |
| Astronomy Decoder | 0 | - | 4.50 | 37,806 |
| Title in the Lyrics Quiz #8 | 0 | - | 4.52 | 111,978 |
| Title in the Lyrics Quiz #9 | 0 | - | 4.47 | 101,678 |
| Books with Names in the Title #2 | 0 | - | 4.42 | 54,421 |
| Citrus Fruits | 0 | - | 3.65 | 41,939 |
| Things Named For People #3 - Science | 0 | - | 4.85 | 53,527 |
| Elemental Words | 0 | - | 4.96 | 51,923 |
| Metals of Antiquity | 0 | - | 4.94 | 92,809 |
| Pasta... or Composer? | 0 | - | 4.63 | 26,491 |
| Songs with Food in the Title | 0 | - | 4.26 | 42,382 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,583,063 |
| Books with Animals in the Title #1 | 0 | - | 4.41 | 74,152 |
| Major Taxonomic Ranks | 0 | - | 4.63 | 79,700 |
| Famous Scientists | 0 | - | 4.57 | 42,387 |
| Astronomy Quiz | 0 | - | 4.89 | 81,563 |
| Countries by National Anthem | 0 | - | 4.92 | 70,997 |
| Title in the Lyrics Quiz #1 | 0 | - | 4.31 | 220,422 |
| Title in the Lyrics Quiz #3 | 0 | - | 4.13 | 122,699 |
| Title in the Lyrics Quiz #4 | 0 | - | 4.34 | 140,748 |
| Title in the Lyrics Quiz #5 | 0 | - | 4.15 | 102,042 |
| Title in the Lyrics Quiz #6 | 0 | - | 4.35 | 93,882 |
| Title in the Lyrics Quiz #7 | 0 | - | 4.38 | 95,124 |
| Title in the Lyrics Quiz #10 | 0 | - | 4.06 | 55,696 |
| Songs with Animals in the Title #2 | 0 | - | 3.90 | 27,862 |
| Song Title Vocabulary | 0 | - | 4.35 | 62,186 |
| Books with Names in the Title #1 | 0 | - | 4.26 | 70,249 |
| Word Scramble - Countries | 0 | - | 4.86 | 2,086,065 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 162,793 |
| Solve the Secret Country #2 | 0 | - | 4.84 | 115,789 |
| Anagram Chain - Countries | 0 | - | 4.99 | 115,045 |
| 7 Deadly Sins | 0 | - | 4.88 | 394,210 |
| Top Five Countries By Category #1 | 0 | - | 4.99 | 446,410 |
| Countries with Four Letters | 0 | - | 4.99 | 417,995 |
| Random Capital to Country | 0 | - | 4.99 | 2,576,015 |
| Random Country to Capital | 0 | - | 4.98 | 910,379 |
| Europe Geography Decoder | 0 | - | 4.86 | 69,478 |
| Countries but all Vowels are Changed to O | 0 | - | 4.92 | 67,605 |
| Solve the Secret Country #3 | 0 | - | 4.98 | 63,001 |
| Scientific Names | 0 | - | 4.32 | 78,089 |
| Science Multiple Choice #1 | 0 | - | 4.53 | 85,973 |
| Lightest Chemical Elements A-Z | 0 | - | 4.57 | 31,893 |
| Periodic Table Quiz - First 20 Elements | 0 | - | 4.72 | 187,106 |
| Periodic Table Elements by Clue #1 | 0 | - | 4.80 | 62,152 |
| Body Part Cliches | 0 | - | 4.43 | 122,870 |
| Medical Conditions Quiz | 0 | - | 4.78 | 122,992 |
| Title in the Lyrics - Disney Songs | 0 | - | 4.36 | 128,869 |
| The Michael Jackson Quiz | 0 | - | 4.21 | 27,957 |
| Countries by Languages in 90 Seconds | 0 | - | 4.93 | 710,435 |
| Islands by Country #1 | 0 | - | 4.87 | 174,386 |
| Regions of Countries #1 | 0 | - | 4.97 | 158,832 |
| Regions of Countries #2 | 0 | - | 4.95 | 123,200 |
| Regions of Countries #3 | 0 | - | 4.84 | 90,273 |
| Countries by Emojis | 0 | - | 4.99 | 235,769 |
| Top Five Countries By Category #2 | 0 | - | 4.93 | 198,112 |
| Top Five Countries By Category #3 | 0 | - | 4.82 | 169,255 |
| Countries With One Word And Two O's | 0 | - | 4.94 | 55,010 |
| Country Chain | 0 | - | 4.96 | 215,542 |
| Can You Name These 50 Random Countries? | 0 | - | 4.98 | 213,458 |
| Capital Cities Chain | 0 | - | 4.84 | 81,791 |
| Name a Valid Capital #1 | 0 | - | 4.96 | 89,852 |
| Category Elimination - Countries #1 | 0 | - | 4.99 | 316,506 |
| Name a Valid Country #3 | 0 | - | 4.99 | 259,514 |
| Name a Valid Country #1 | 0 | - | 4.99 | 282,801 |
| Name a Valid Country #2 | 0 | - | 4.98 | 246,059 |
| Name a Valid Country #4 | 0 | - | 4.97 | 251,210 |
| Name a Valid Country #5 | 0 | - | 4.99 | 189,532 |
| Name a Valid Country #6 | 0 | - | 4.94 | 126,156 |
| Name a Valid Country #7 | 0 | - | 4.91 | 126,260 |
| Name a Valid Country #8 | 0 | - | 4.85 | 95,778 |
| Add A Letter - Make a European City | 0 | - | 4.90 | 23,223 |
| Body Parts in History and Culture | 0 | - | 4.42 | 34,992 |
| Science General Knowledge #1 | 0 | - | 4.54 | 163,302 |
| Science General Knowledge #2 | 0 | - | 4.47 | 116,539 |
| Science General Knowledge #3 | 0 | - | 4.55 | 99,105 |
| Science Vocabulary #2 | 0 | - | 4.52 | 59,194 |
| Word Chain - Science | 0 | - | 4.59 | 54,349 |
| Diseases: Virus... or Bacteria? | 0 | - | 4.61 | 38,322 |
| Science Multiple Choice #2 | 0 | - | 4.40 | 36,296 |
| Most Common Elements in the Human Body | 0 | - | 4.74 | 150,205 |
| Name the Constellations - With a Map | 0 | - | 4.92 | 35,546 |
| Environmental Issues | 0 | - | 4.54 | 26,708 |
| Musical Instruments by Picture #2 | 0 | - | 4.24 | 46,622 |
| Title in the Lyrics - Hair Band Songs | 0 | - | 4.02 | 21,639 |
| Title in the Lyrics - Musicals | 0 | - | 4.28 | 54,339 |
| Title in the Lyrics - Names | 0 | - | 3.94 | 41,156 |
| Divided World City Name Puzzle #1 | 0 | - | 4.88 | 48,031 |
| Most Common U.S. Last Names - Extreme | 0 | - | 4.94 | 173,015 |
| Countries by Initial Letter and Continent #3 | 0 | - | 4.93 | 47,504 |
| Countries by Initial Letter and Continent #2 | 0 | - | 4.91 | 95,553 |
| Movies with Colors in the Title #1 | 0 | - | 3.84 | 36,084 |
| Movies with Colors in the Title #2 | 0 | - | 3.47 | 54,312 |
| Books with Food in the Title | 0 | - | 3.93 | 39,575 |
| Books with Animals in the Title #2 | 0 | - | 4.23 | 17,956 |
| Countries of Africa - One Minute Sprint | 0 | - | 4.42 | 319,171 |
| UNESCO World Heritage Sites to Country | 0 | - | 4.97 | 102,533 |
| The Eleven Colors | 0 | - | 4.73 | 233,144 |
| Marvel Cinematic Universe - All Movies | 0 | - | 4.89 | 331,902 |
| Africa Geography Quiz #1 | 0 | - | 4.93 | 48,965 |
| Five Biggest Immigrant Groups by Country #1 | 0 | - | 4.97 | 179,302 |
| Five Biggest Immigrant Groups by Country #2 | 0 | - | 4.91 | 88,358 |
| Top Five Countries By Fruit Production | 0 | - | 4.96 | 76,909 |
| The Only Country ... | 0 | - | 4.91 | 79,694 |
| American Countries with the Shortest Names | 0 | - | 4.96 | 120,242 |
| Random Countries by Borders | 0 | - | 4.99 | 81,566 |
| Top Five Countries by Random Categories | 0 | - | 4.95 | 135,849 |
| Random Name a Valid Country | 0 | - | 4.99 | 202,962 |
| Random World Capitals on a Map | 0 | - | 4.93 | 132,950 |
| Empty World Map without 20 Random Countries | 0 | - | 4.94 | 134,430 |
| World Map with 10 Random Extra Borders | 0 | - | 4.95 | 377,908 |
| European Map without 10 Random Countries | 0 | - | 4.97 | 273,942 |
| Fruits by Picture | 0 | - | 4.20 | 804,280 |
| Countries with the Most McDonald's Locations | 0 | - | 4.83 | 110,278 |
| Biggest Countries with No McDonald's | 0 | - | 4.84 | 88,755 |
| World Countries by 10 Category Elimination #1 | 0 | - | 4.97 | 121,239 |
| Capital Cities in Squares of an Empty World Map | 0 | - | 4.99 | 88,557 |
| Category Elimination - Countries #2 | 0 | - | 4.98 | 233,225 |
| Category Elimination - Countries #3 | 0 | - | 4.99 | 222,506 |
| Category Elimination - Countries #4 | 0 | - | 4.99 | 190,051 |
| Category Elimination - Capital Cities #1 | 0 | - | 4.87 | 131,341 |
| Category Elimination - European Geography #1 | 0 | - | 4.98 | 230,181 |
| Category Elimination - Capital Cities #2 | 0 | - | 4.89 | 79,376 |
| Category Elimination - European Geography #2 | 0 | - | 4.99 | 164,876 |
| Category Elimination - Asian Geography #1 | 0 | - | 4.85 | 108,534 |
| Category Elimination - African Geography #1 | 0 | - | 4.90 | 90,951 |
| Category Elimination - Asian Geography #2 | 0 | - | 4.94 | 95,420 |
| Category Elimination - European Geography #3 | 0 | - | 4.85 | 79,625 |
| Name a Valid Island Country | 0 | - | 4.96 | 113,924 |
| Groups of Two - Science | 0 | - | 4.26 | 48,116 |
| Science Vocabulary #1 | 0 | - | 4.34 | 71,326 |
| Science Vocabulary #3 | 0 | - | 4.31 | 51,617 |
| Science Decoder | 0 | - | 4.52 | 28,634 |
| Simple Machines Quiz | 0 | - | 4.35 | 9,039 |
| Rocks and Minerals Picture Quiz | 0 | - | 4.48 | 29,137 |
| Elements by Picture | 0 | - | 4.27 | 69,479 |
| Medical Acronyms | 0 | - | 4.43 | 95,715 |
| Medical Vocabulary | 0 | - | 4.54 | 58,465 |
| Musicians Who Died Young | 0 | - | 4.39 | 107,336 |
| 2000s Music Trivia #1 | 0 | - | 4.04 | 66,645 |
| 2000s Music Trivia #2 | 0 | - | 4.19 | 52,523 |
| 1990s Music Trivia #1 | 0 | - | 4.28 | 50,540 |
| 1990s Music Trivia #2 | 0 | - | 4.06 | 35,523 |
| #1 Hits of the 1980s | 0 | - | 4.87 | 147,404 |
| Twelve Days of Christmas | 0 | - | 4.45 | 145,550 |
| Rudolph the Red-Nosed Reindeer | 0 | - | 4.53 | 75,973 |
| Songs From Movies | 0 | - | 4.35 | 65,426 |
| Historical Middle Names | 0 | - | 4.16 | 35,333 |
| People with Food Names | 0 | - | 4.10 | 60,415 |
| First Names of Historical Figures #2 | 0 | - | 4.32 | 40,194 |
| First Names of Historical Figures #1 | 0 | - | 4.39 | 228,498 |
| Random Nicknames #1 | 0 | - | 4.10 | 34,713 |
| Birth Names | 0 | - | 4.30 | 61,416 |
| Word Scramble - Cities #1 | 0 | - | 4.50 | 98,933 |
| Literary Quotes #1 | 0 | - | 4.49 | 33,352 |
| Top 100 Movie Quotes | 0 | - | 4.44 | 67,253 |
| Star Wars Quotes | 0 | - | 4.84 | 173,238 |
| Quotes from Historical Figures #1 | 0 | - | 4.50 | 87,072 |
| Santa's Reindeer | 0 | - | 4.47 | 191,383 |
| Countries of the World - One Minute Sprint | 0 | - | 4.35 | 955,542 |
| Countries of Asia - One Minute Sprint | 0 | - | 4.41 | 272,939 |
| Countries by Borders in 90 Seconds with an Empty Map | 0 | - | 4.90 | 277,185 |
| Foods by Country of Origin #1 | 0 | - | 4.41 | 334,384 |
| Musical Acts by Country #1 | 0 | - | 4.45 | 78,808 |
| Places with Colors in the Name | 0 | - | 4.27 | 72,149 |
| What Color is It - Multiple Choice | 0 | - | 4.47 | 43,714 |
| Cocktail Shopping List | 0 | - | 4.43 | 44,371 |
| Largest World Cities With Five Letters | 0 | - | 4.52 | 66,342 |
| Word Scramble - European Countries | 0 | - | 4.74 | 140,904 |
| Word Scramble - Asian Countries | 0 | - | 4.48 | 108,033 |
| Random Countries with Letters Missing | 0 | - | 4.51 | 93,239 |
| Capitals in Random Squares of the World Map | 0 | - | 4.92 | 74,822 |
| Random Countries Hidden in the World Map | 0 | - | 4.81 | 111,487 |
| Christmas Decoder | 0 | - | 4.42 | 49,349 |
| Cities Chain #2 | 0 | - | 4.42 | 56,145 |
| Cities Chain #1 | 0 | - | 4.61 | 66,309 |
