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Re: the remainder ???
n = 7f + 5
2n = 2(7f +5)
2n = 7(2f) + 10
2n = 7(2f) + 7 + 3
2n = 7(2f + 1) + 3
therefore the remainder is 3
if w,x,y,z are consecutive positive integers:
(w+x)(x+y)(y+z) is always odd (odd + even = odd, and odd * odd = odd)
an odd number divided by 2 gives remainder of 1
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Learning..
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