To solve you first need to pick out the most important information, ~Spent 20 minutes ~Each prob takes 2 minutes Lets have y be the total time spent, and x the number of probs (y/2) = x Hope this helped!! ^-^
Ben has mixed up the digit for millions and hundred thousands: he wrote 5 in the place for millions and 6 in the place for hundred thousands, but it should be the other way. I think that he should exchange those two digits in the faulty report.
