



 
Nana, I'll give you a start  I'm guessing you've tried the first few numbers already and noticed that 2,4 & 8 don't work? What's special about these numbers? Consider 100 = (2x12+1)(4) = (123)+(122)+...+12+13+...+(12+4), a sum of 8 numbers; also consider 320 = (2x2+1)(64) = 62+63+...+66 a sum of 5 numbers. What's the pattern? Penny
 


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