![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
How many days is 27000 hours?
1125 days
How many hours is 222 days
5328
2002+2004+2006+2008+...+2050=?
2002+2004+2006+2008+...+2050=2000*25+2+4+6+8+...+50=50000+13*50=50000+650=50650
It`s too easy!
Calculation 1 / 2000 * 2002 + 1 / 2002 * 2004 + 1 / 2004 * 2006 + 1 / 2006 * 2008 + 1 / 2008 * 2010
Original formula = ((1 / 2000-1 / 2002) + (1 / 2002-1 / 2004) + (1 / 2004-1 / 2006) + (1 / 2006-1 / 2008) + (1 / 2008-1 / 2010)) / 2
=(1/2000-1/2010)/2
=5/2000*2010
=5/4020000
=1/804000
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