Question: Mr. Tan has 216 apples and pears altogether. He packed all the apples and pears into 30 bags. He packed the apples in bags of 6 and the pears in bags of 8. (a) How many bags of apples did he have? (b) How many apples did he have altogether? *The original question...

Question: Jolene had 138 fewer marbles than Clarissa at first. Then, Jolene received 29 marbles from Clarissa and bought another 25 marbles. How many fewer marbles did Jolene have than Clarissa in the end? *The original question & solution involving the “model drawing technique” is presented in the images below

                      Several people have queried me on this and thus here’s a detailed explanation. This is actually an ancient Math logic problem (with many versions). The idea to solve it “logically” is like this: (1) A person only “doesn’t know” if there are at...