• Question: I am the only single-digit number that, when multiplied by any other single-digit number, always results in a multiple of nine. What am I?
  
  Answer: Nine
• Question: I am the number of lives that cats are said to have in folklore. What am I?
  
  Answer: Nine
• Question: I am the number of innings in a standard game of baseball. What am I?
  
  Answer: Nine
• Question: I am the number of planets in the solar system if you exclude Pluto. What am I?
  
  Answer: Nine
• Question: I am the number of justices that sit on the United States Supreme Court. What am I?
  
  Answer: Nine
• Question: I am the number of circles in a game of tic-tac-toe once it’s filled. What am I?
  
  Answer: Nine
• Question: I am the number of months it takes for a human to complete gestation. What am I?
  
  Answer: Nine
• Question: I am the number of lines in a stanza of a traditional haiku poem. What am I?
  
  Answer: Nine
• Question: I am the sum of the first three odd prime numbers. What am I?
  
  Answer: Nine (3 + 5 + 1)
• Question: I am the number of players on each side of a field in a soccer match. What am I?
  
  Answer: Nine
• Question: I am the atomic number of fluorine in the periodic table. What am I?
  
  Answer: Nine
• Question: I am the number of circles in a game of nine-ball pool at the beginning of a match. What am I?
  
  Answer: Nine
• Question: I am the number of lives in a game of the classic video game “Super Mario Bros.” What am I?
  
  Answer: Nine
• Question: I am the number of provinces in South Africa. What am I?
  
  Answer: Nine
• Question: I am the number of symphonies composed by Ludwig van Beethoven. What am I?
  
  Answer: Nine
• Question: I am the number of muses in Greek mythology. What am I?
  
  Answer: Nine
• Question: I am the number of squares on each side of a standard Rubik’s Cube. What am I?
  
  Answer: Nine
• Question: I am the number of justices on the Supreme Court of Canada. What am I?
  
  Answer: Nine
• Question: I am the number of circles in a game of the classic board game “Nine Men’s Morris” at the start. What am I?
  
  Answer: Nine
• Question: I am the number of provinces in the North Island of New Zealand. What am I?
  
  Answer: Nine

• Question: I am the number of lives a cat is said to have in the popular myth. What am I?
  
  Answer: Nine
• Question: I am the number of innings in a full game of baseball. What am I?
  
  Answer: Nine
• Question: I am the number of months of human gestation. What am I?
  
  Answer: Nine
• Question: I am the number of squares on each side of a Rubik’s Cube. What am I?
  
  Answer: Nine
• Question: I am the number of justices on the Supreme Court of the United States. What am I?
  
  Answer: Nine
• Question: I am the number of players on each side of a standard volleyball team. What am I?
  
  Answer: Nine
• Question: I am the number of circles on a standard game of Connect Four. What am I?
  
  Answer: Nine
• Question: I am the number of provinces in the Philippines. What am I?
  
  Answer: Nine
• Question: I am the number of levels in Dante’s Divine Comedy. What am I?
  
  Answer: Nine
• Question: I am the number of squares on each side of a game of Sudoku. What am I?
  
  Answer: Nine
• Question: I am the number of reindeer that traditionally pull Santa Claus’ sleigh. What am I?
  
  Answer: Nine
• Question: I am the number of circles in a game of tic-tac-toe after a win. What am I?
  
  Answer: Nine
• Question: I am the number of circles in a game of Chinese checkers. What am I?
  
  Answer: Nine
• Question: I am the number of provinces in South Africa. What am I?
  
  Answer: Nine
• Question: I am the number of innings in a standard game of cricket. What am I?
  
  Answer: Nine
• Question: I am the number of letters in the word “nine”. What am I?
  
  Answer: Nine
• Question: I am the number of circles in a game of the classic board game “Nine Men’s Morris” when fully set up. What am I?
  
  Answer: Nine
• Question: I am the number of major planets in the Solar System excluding Earth. What am I?
  
  Answer: Nine
• Question: I am the number of lives in a game of the classic video game “Contra”. What am I?
  
  Answer: Nine
• Question: I am the number of provinces in the North Island of New Zealand. What am I?
  
  Answer: Nine

Another Nine riddles

• What number has a single syllable but contains three times three?
• What digit, when multiplied by any other single-digit number, always results in a multiple of nine?
• What mathematical symbol resembles a twisted loop but represents a value of nine when rotated 90 degrees clockwise?
• What is the smallest positive integer that remains unchanged when divided by nine?
• What number, when spelled out, has as many letters as its value?
• What is the only perfect square that is one less than a multiple of nine?
• What is the sum of the first three prime numbers multiplied by three?
• What is the only number whose English name is spelled with the same number of letters as its value?
• What is the result when the number of days in a week is added to the number of planets in our solar system?
• What number is both the product of three and the sum of its digits?

• I’m the number of innings in a game of baseball. What am I?
  Answer: Nine.
• What’s the number of players on a side in a game of volleyball?
  Answer: Nine.
• I’m the only single-digit square that’s neither a one nor a perfect square. What number am I?
  Answer: Nine.
• What’s the number of circles in a game of tic-tac-toe?
  Answer: Nine.
• I’m the number of provinces in South Africa. What number am I?
  Answer: Nine.
• How many symphonies did Beethoven compose?
  Answer: Nine.
• What’s the number of justices on the United States Supreme Court?
  Answer: Nine.
• I’m the digit that when multiplied by any other single-digit number results in a multiple of nine. What am I?
  Answer: Nine.
• What’s the highest single-digit prime number?
  Answer: Nine.
• I’m the number of lives a cat is said to have. What number am I?
  Answer: Nine.
• How many circles are there in a game of tic-tac-toe?
  Answer: Nine.
• What number is the atomic number of fluorine?
  Answer: Nine.
• How many planets were there before Pluto was reclassified as a dwarf planet?
  Answer: Nine.
• I’m the number of provinces in the Netherlands. What number am I?
  Answer: Nine.
• What’s the number of justices on the United States Supreme Court?
  Answer: Nine.
• I’m the number of squares on a standard tic-tac-toe board. What am I?
  Answer: Nine.
• How many members typically make up a jury in a trial?
  Answer: Nine.
• What’s the atomic number of fluorine on the periodic table?
  Answer: Nine.
• How many provinces are there in South Africa?
  Answer: Nine.
• I’m the number of innings in a regulation game of baseball. What number am I?
  Answer: Nine.

Getting over with Nine riddles

• What number do you get when you add three threes?
• I am the smallest single-digit odd number. What am I?
• What comes after eight but before ten?
• I am a square number less than ten. What number am I?
• What’s the only single-digit number with two syllables?
• What’s the sum of all the digits in a phone number?
• I am the only number that, when written, has the same number of letters as its value. What number am I?
• What’s the result when you multiply any number by nine and then add the digits of the product?
• What’s the number of lives a cat supposedly has in folklore?
• I am the highest single-digit number in octal system. What number am I?
• What number represents perfection in baseball?
• I am the number of planets in our solar system, excluding dwarf planets. What number am I?
• What number is represented by IX in Roman numerals?
• What’s the number of players on a baseball team?
• What number is the result of the expression “three squared”?
• What’s the smallest odd prime number?
• I am a non-negative integer one less than ten. What number am I?
• What’s the only number in the English language with its letters in alphabetical order?
• What’s the atomic number of fluorine?
• What’s the number of Supreme Court justices in the United States?