It is back to school and my son is now in P4. The maths, it seems, getting tougher with each year. So it is the first month of school and the teacher decided to give a maths workshop, which I suspect is to gauge the level of "smartness" in addressing questions. I look at every maths question as a challenge. Out of the 4 questions, I was initially stumped by the following questions on marbles. There were twice as many blue marbles as red marbles in a container. After 240 red marbles were removed from the container, the number of blue marbles was thrice the number of remaining red marbles. How many blue marbles were there in the container? My initial approach to the question was to go with the first sentence, followed by the next one. This gave me the following block diagram. That got me stumped. the problem was how do you account for the 240 red marbles that were removed? How do you find the answer then? I searched the internet and even got an example of ratios...