Puzzle categories

Every released Owlet puzzle sorted by the mathematical family it belongs to. Tap a number to read its backstory.

Perfect squares

nยฒ โ€” the numbers you get by multiplying an integer by itself.

Perfect cubes

nยณ โ€” the numbers you get by cubing an integer.

Powers of two

1, 2, 4, 8, 16, 32, โ€ฆ the doubling ladder.

Primes

Numbers divisible only by 1 and themselves.

Fibonacci numbers

Each term is the sum of the previous two.

Palindromes

Read the same forwards and backwards.

Factorials & primorials

n! and n# โ€” running products of small integers or primes.

Famous constants & curiosities

Numbers with their own stories in math and computing.

  • 100 โ€” century
  • 496 โ€” perfect number
  • 500 โ€” Roman D
  • 720 โ€” 6!
  • 1,000 โ€” thousand
  • 1,093 โ€” Wieferich prime
  • 1,618 โ€” golden ratio ร—1000
  • 1,729 โ€” Ramanujan number
  • 2,584 โ€” Fibonacci Fโ‚โ‚ˆ
  • 2,718 โ€” e ร—1000
  • 3,141 โ€” ฯ€ ร—1000
  • 4,181 โ€” Fibonacci Fโ‚โ‚‰
  • 5,040 โ€” 7!
  • 6,174 โ€” Kaprekar's constant
  • 8,128 โ€” perfect number
  • 8,191 โ€” Mersenne prime (2ยนยณ-1)
  • 9,801 โ€” 99ยฒ & reciprocal parade
  • 9,999 โ€” 9999 = 3ยฒยท11ยท101
  • 10,000 โ€” myriad
  • 12,321 โ€” 111ยฒ
  • 12,345 โ€” counting up
  • 12,496 โ€” sociable-number chain
  • 30,030 โ€” primorial 13#
  • 40,320 โ€” 8!
  • 46,656 โ€” 6โถ
  • 65,536 โ€” 2ยนโถ
  • 65,537 โ€” Fermat prime Fโ‚„
  • 86,400 โ€” seconds in a day
  • 142,857 โ€” cyclic number
  • 271,828 โ€” e ร—10โต
  • 998,001 โ€” 1/998001 curiosity
  • 1,000,000 โ€” million
  • 1,234,321 โ€” palindrome sqrt
  • 1,618,033 โ€” golden ratio ร—10โถ
  • 3,628,800 โ€” 10!
  • 31,536,000 โ€” seconds in a year
  • 33,550,336 โ€” perfect number
  • 1,000,000,007 โ€” coder's favorite prime
  • 1,234,567,891 โ€” prime with digits 1-9-1

Other favorites

Numbers that resist tidy labels but still delight.