He takes 2 pages of notes every day for each of his 5 classes so that's 2*5 = <<2*5=10>>10 pages of notes
He takes 10 pages of notes every day for 5 days so that's 10*5 = <<10*5=50>>50 pages of notes
If he takes 50 pages of notes every week for 6 weeks that's 50*6 = <<50*6=300>>300 pages of notes
His notebook paper comes 100 pages per pack and he has taken 300 pages of notes so he used 300/100 = <<300/100=3>>3 packs of notebook paper
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