Tuesday, June 1, 2010

700

700 = 22 x 52 x 7.

700 is the sum of four consecutive primes: 700 = 167 + 173 + 179 + 181.

700 is a number that cannot be written as a sum of three squares.

700 is 221221 in base 3 and 2020 in base 7.

700 is the number of n-bead necklaces with four colors, for n = 7.

The first known recorded use of the zero in Europe occurred in the year 700.

Source: Wikipedia

1 comment:

  1. El 700 es hipotenusa de dos ternas pitagoricas:
    700^2=196^2+672^2
    700^2=420^2+560^2
    Si n es un racional donde (n+28)^2-(n+25)^2=700^2, resulta para n=489841/6, de donde
    700^2+(4899991/6)^2=(490009/6)^2
    Rafael Parra de Barcelona

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