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1000 words that a picture is worth
That's a good Brain Teaser.
"1000 W that a P is W" Means "1000 Words that a Picture is Worth"
if ppm means part per million,
1000 ppm = 1000 p 1000000 = 1 p 1000 = 0.1%
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(p+150) + q = 1000 p+q= 1000-150 =850 Value of q is 425 and value of p 425 plus 150 ie. 575