M
mrhtbd
Guest
I am not familiar with this as I live near Washington, DC. What's Cali up to now?
I am not familiar with this as I live near Washington, DC. What's Cali up to now?
I call BULLSHIT!
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In mathematics
Eighty-one is the square of 9 and the fourth power of 3. Like all powers of three, 81 is a perfect totient number. It is a heptagonal number and a centered octagonal number. It is also a tribonacci number, and an open meandric number. 81 is the ninth member of the Mian-Chowla sequence.
In base 10, it is a Harshad number, and one of three non-trivial numbers (the other two are 1458 and 1729) which, when its digits are added together, produces a sum which, when multiplied by its reversed self, yields the original number:
8 + 1 = 9
9 ? 9 = 81
(although this case is somewhat degenerate, as the sum has only a single digit).
I call BULLSHIT!
=====================================================
In mathematics
Eighty-one is the square of 9 and the fourth power of 3. Like all powers of three, 81 is a perfect totient number. It is a heptagonal number and a centered octagonal number. It is also a tribonacci number, and an open meandric number. 81 is the ninth member of the Mian-Chowla sequence.
In base 10, it is a Harshad number, and one of three non-trivial numbers (the other two are 1458 and 1729) which, when its digits are added together, produces a sum which, when multiplied by its reversed self, yields the original number:
8 + 1 = 9
9 ? 9 = 81
(although this case is somewhat degenerate, as the sum has only a single digit).
I am not familiar with this as I live near Washington, DC. What's Cali up to now?
u gonna be a biker?!