2017 Psle Math Questions And Answers Review

Tap A fills a tank in 6 hours. Tap B fills the same tank in 4 hours. Tap C empties the tank in 8 hours. If all three taps are turned on together for 2 hours, and then Tap C is turned off, how much more time is needed for the tank to be full?

Before Aaron (original amount): Let original = A. Aaron ate 1/5 of A, leaving 4/5 of A = B = 144. So A = 144 × 5/4 = 180. 2017 psle math questions and answers

(Self-check: Students often forget to convert decimals correctly. 5.9 / 2 is 2.95. 2.95 / 2 is 1.475.) Tap A fills a tank in 6 hours

Before diving into the specific , it is crucial to understand the context. In 2017, parents took to social media to complain that the paper was excessively difficult. Several "killer questions" surfaced, testing not just arithmetic but complex logical reasoning and heuristics (problem-solving strategies). If all three taps are turned on together

This question gained significant attention for its "booby traps" regarding unit conversion and rounding.

Red used = 2/3 of total red (R). So 2/3 × R = 48 units → R = 48 × 3/2 = 72 units. Blue used = 3/5 of total blue (B). So 3/5 × B = 24 units → B = 24 × 5/3 = 40 units.

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