Here are the questions posted at The Straits Times. The trick here is the blocks of Ken. It contains the extra “12” if you would want to compare with Jim ratio from sweets to chocolates. It is because the ratio of sweets at Jim and Ken are both “1”. Hence, to find the 3 units of Jim, you need to include the “12” in the 4 blocks, that gives you a unit of 22. To find Ken’s sweets, do remember to add back the “12” as the unit of 22 mentioned above is for Jim. a) Remember the bakery is exactly half-way between the two houses. Hong cycled 120m more and Jeya cycled 120m less too! In total, Hong cycled 120m x 2 = 240m more than Jeya. b) Hong cycled 15 m/minute faster than Jeya. 240m/ 15 = 16 minutes. You can imagine in this way. In order to cycle 240m more than Jeya, Hong needed to cycle 16 minutes because every minute, he was 15m more than Jeya. Hong and Jeya timings were the same, both travel time were 16 minutes. Jeya speed was 70meter per minute, traveled 16 minutes. That