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Old 11-13-2012, 02:51 PM   #10 (permalink)
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I think adding parenthesees affects the calculation. Looks like 320 to me.
4x4=16
16+4=20
20x4=80
80+4=84
84-4=80
80x4=320
James calculation would give you 20
16+16+4=36
36-16=20

regards
Mech
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