Saturday, November 14, 2009

How many gifts are given in total on the 12 days of Christmas?

How many gifts are given totally in the 12 days of christmas- including repeats- ex. 1 on first day 1+2 second day, 1+2+3 on the third day.....


My mind has gone blank, and I need some help- I don't want to have to take all the time to do the math for this..... thanks :)

How many gifts are given in total on the 12 days of Christmas?
It takes longer to type than to do the math.


1+2+3+4+5+6+7+8+9+10+11+12=78 for the 12th day


1+2+3+4+5+6+7+8+9+10+11 = 66 etc.


1+2+3+4+5+6+7+8+9+10=55


1+2+3+4+5+6+7+8+9=45


1+2+3+4+5+6+7+8=36


1+2+3+4+5+6+7=28


1+2+3+4+5+6=21


1+2+3+4+5=15


1+2+3+4=10


1+2+3=6


1+2=3


1





adding together = 364
Reply:144 or 12 your choice
Reply:if each time you re-add them it would be 364, if you only count each one once it would be 78
Reply:[1(12) + 2(11) + 3(10) + 4(9) + 5(8) + 6(7)] * 2





=





364
Reply:Worked it out on the calculator . . . total: 364 gifts.


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