Markus has a total of 63 red, green and blue Lego blocks in the ratio 3:2:4. How many red Lego blocks did he have?
+2666 Add everything up in the ratio \(3:2:4\). This means that there are 9 "parts", each "part" having 7 Lego blocks.
This means he has \(3 \times 7 = \color{brown}\boxed{21}\) red Lego blocks.
