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P6 patterm using Sum of the Numbers
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TOPIC: P6 patterm using Sum of the Numbers
#4577
P6 patterm using Sum of the Numbers 1 Year, 5 Months ago Karma: 2
a series of sums of even numbers is shown below.

2=2=1x2
2+4=6=2x3
2+4+6=12=3x4
2+4+6+8=20=4x5
2+4+6+8+10=30=5x6
..
find the sum of even numbers from 2 to 40 inclusive
Shirley
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Last Edit: 2010/08/29 16:24 By Chris.
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#4581
Re:P6 patterm 1 Year, 5 Months ago Karma: 0
40 ÷ 2 = 20 numbers
2 + 4 +……+ 40 = 20 x 21 = 420
Evelyn Ng
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#4587
Re:P6 patterm 1 Year, 5 Months ago Karma: 2
thanks!
Shirley
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