• ADMIN M0★ M1 M5

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  • ADMIN M0★ M1 M5

    [Originally posted in Discussions]

    This was a great video. I really liked how the Professor showed the two methods of solving the problem - the multiplication principle plus the principle of working out the total number of numbers between 991 and 100. He also explained why you added one more (with the analogy of a step really well). Great videos and course!