With a simple algorithm: (1 + 3 + 5 + 7. + 2005) - (2 + 4 + 6 + 8. + 2004) = who can answer? | Math enthusiast | Mathematical art

With a simple algorithm: (1 + 3 + 5 + 7. + 2005) - (2 + 4 + 6 + 8. + 2004) = who can answer?

(1+3+5+7.+2005)-(2+4+6+8.+2004)
= 1+(3-2)+(5-4)+(7-6)+(9-8)+.+(2005-2004)
=1+(1+1+1+.+1)
=1+2004/2
=1003

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