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What If? is the fourteenth episode of Season 8 of Numberblocks and the 119th episode of the series overall.


What if there were a way to explore every possible question? Imagine that! Learn the power of asking questions with the Numberblocks.


Mathematical concepts mentioned

  • Infinity: "But how high could you get if forever never ends?"
  • Orders of Magnitude: "What if you kept writing zeroes after One?"
  • Powers of 2: "What if you start with a single grain of rice? Then double it, double it, double it every day? "
  • Fractions: "What if One could be divided into pieces?"
  • Years: "Would it take a hundred years to reach the top?"
  • Numerals: "What if the Numberblocks each had a different name?"
  • ...languages that only have words for 1-3, I guess? "One, two, three, plenty, many, lots!"
  • Numeral systems and number bases: in the same scene as above, 4, 5, and 6 are shown as "three-one", "three-two", and "three-three", which is similar to Ternary.
  • Abstract thinking: "What if the Numberblocks all disappeared one day? Would One and Two and Three still equal Six?"
  • Negative Numbers: "What if there could be a number less than Zero?"


  • This is the 2nd appearance of the What-Iffer
  • This is also the second appearance of One Thousand, Ten Thousand, One Hundred Thousand, and One Million.
    • The episode also introduces Ten Million, One Hundred Million, and One Billion.
  • 3 asks "What if we could build a tower to the moon?", but 6, 7, 8, 9, and 10 have already built a tower to a different planet.
  • This is the second appearance of the full-month calendar.
    • Oddly, Thirty-One doesn't appear in this episode, though he does make a cameo ON the calendar.
  • There are references to Twoland, One Thousand and One, Figure It Out (the calendar), and some other episodes.
  • This is the last episode of Season 8 that introduces a math concept since 100 Ways to Leave the Planet is mainly a recap of the show.
  • Sixty-Four is a bit bigger in this episode.
  • This is the first time a numberblock reaches the height of 1000 blocks
  • This episode ends the longest streak of Numberblocks (starting from Four On The Floor) to introduce a new character every episode, 6 episodes.
  • 11 - 20 don't speak in this episode however they can be heard chearing at the end of the episode.
  • This is the first episode where a Numberblock isn't their usual size. The second being The Case of the Missing Blocks.


  • In one scene where 10 Million appears, her pupils are visible when she closes her eyes.



@Numberblocks - Full Episodes - S5 EP30- What If?