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Pure Numbers Daily Blog

Fun mathematical facts about today's date! I use a range of math operations and tools including (but not limited to), arithmetic, exponents, geometry, factorials, different number base systems, trigonometry, combinations and permutations. I welcome submissions that add onto today's date or suggest an idea for a future date. Enjoy!
Sep 19 '14

9/19/14

9 * 1 / 9 = 1^4

Also:

9 + 1 - 9 = 1^4

Also:

√9 + 1 = 9 - 1 - 4

Also:

9 = 1 + √9 + 1 + 4

Tags: 9.19.14
Sep 18 '14

9/18/14

(9 - 1) / 8 = 1^4

Also:

√9 + 1 = 8 - (1 * 4)

Also:

9 + 1 - 8 = 1 * √4

Tags: 9.18.14
Sep 17 '14

9/17/14

√9 = 17 - 14

Also:

9 = (1 * 7) + (1 * √4)

Also:

|√9 + 1 - 7| = |1 - 4|

Tags: 9.17.14
Sep 16 '14

9/16/14

9 + 1 = (6 * 1) + 4

Also:

9 - 1 - 6 = 1 * √4

Also:

91 (mod 6) = 1^4

Also:

|√9 + 1 - 6| = 1 * √4

Tags: 9.16.14
Sep 15 '14

9/15/14

|√9 + 1 - 5| = 1^4

Also:

9 = 1 + 5 - 1 + 4

Also:

91 (mod 5) = 1^4

Also:

9 = (1 * 5) + (1 * 4)

Tags: 9.15.14
Sep 14 '14

9/14/14

9 = (1 * 4) + 1 + 4

Also:

91 (mod 4) = |1 - 4|

Also:

9 = (1 + √4) * (1 + √4)

Tags: 9.14.14
Sep 13 '14

9/13/14

9 * 1 / 3 = |1 - 4|

Also:

√9 + 1 - 3 = 1^4

Also:

9 = 13 - (1 * 4)

Also:

91 (mod 3) = 1^4

Tags: 9.13.14
Sep 12 '14

9/12/14

9 = 12 + 1 - 4

Also:

√9 / (1 + 2) = 1^4

Also:

(9 - 1) / 2 = 1 * 4

Also:

√9 + (1 * 2) - 1 = 4

Also:

9 = (1 + 2) * (|1 - 4|)

Tags: 9.12.14
Sep 11 '14

9/11/14

9 = 11 - (1 * √4)

Also:

√9 = |11 - 14|

Tags: 9.11.14
Sep 10 '14

9/10/14

9 = 10 - 1^4

Also:

9 = 10 + 1 - √4

Tags: 9.10.14