Difficulty Level: Hard
Stats: 580 / 1,669 ( 34.75% ) got this right

Which number does not belong in the series below?
7, 8, 18, 57, 228, 1165, 6996

  • 18
  • 57
  • 228
  • 1165
  • 6996

Get a new IQ question delivered to your inbox every day.

* indicates required
Take The IQ Test