human
Lloyd, Mark, and Michael have their Pokemon cards collection. Currently, Mark has thrice as many cards as Lloyd but has 10 fewer cards than Michael. If Michael has 100 cards now, how many more cards should they collect so that all three of them will have a total of 300 cards?
assistant
How many cards does Mark have? ** Mark has 10 fewer cards than Michael so Mark has 100 cards - 10 cards = 90 cards.
How many cards does Lloyd have? ** So, Lloyd has 90 cards / 3 = <<90/3=30>>30 cards.
How many cards do all three of them have? ** All three of them have 90 cards + 30 cards + 100 cards = <<90+30+100=220>>220 cards.
How many more cards should they collect so that all three of them will have a total of 300 cards? ** Thus, they need to collect 300 cards - 220 cards = <<300-220=80>>80 more cards.
#### 80