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Built for Singapore MOE syllabuses · 2026 (PSLE → A-Levels)

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O-Level A-Maths

Worked example

Question

Differentiate y = (2x − 3)⁵. Hence, find dy/dx when x = 2.

1

Use chain rule

Let u = 2x − 3. Then y = u⁵. So dy/dx = (dy/du) · (du/dx).

2

Differentiate

dy/du = 5u⁴ and du/dx = 2. Hence dy/dx = 10(2x − 3)⁴.

3

Substitute x = 2

dy/dx = 10(2·2 − 3)⁴ = 10(1)⁴ = 10.

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Why AskCher is different

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We teach you the exact keywords MOE wants.

MOE Science exams are keyword-strict. Understand the concept but miss one phrase? Zero marks. AskCher flags the exact terms Cambridge markers are looking for — so you never lose marks on technicalities.

O-Level Biology · 6093

Student’s answer

“Water moves from the soil into the root hair cell because there is more water outside.”

AskCher keyword check

Conceptually right, but MOE requires: osmosis water potential gradient partially permeable membrane

Full-mark answer

“Water moves by osmosis from the soil (higher water potential) to the root hair cell (lower water potential) down a water potential gradient, through the partially permeable membrane.”

What our AI knows

Trained on the full MOE syllabus.

AskCher has studied every topic, learning outcome, and content descriptor from the official 2026 MOE and Cambridge syllabuses for these 14 subjects.

P3–P6 Standard & Foundation curriculum

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P3–P6 themes: Diversity, Cycles, Systems, Energy, Interactions

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Number, Algebra, Geometry, Statistics & Probability

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Calculus, Trigonometry, Proofs, Binomial Theorem

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Atomic structure, Bonding, Acids/Bases, Redox, Organic

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Cell biology, Genetics, Transport, Ecology, Inheritance

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Combined Science (Phy/Chem)

Physics Sec 3–4 core + Chemistry Sec 3–4 core

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Combined Science (Phy/Bio)

Physics Sec 3–4 core + Biology Sec 3–4 core

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Combined Science (Chem/Bio)

Chemistry Sec 3–4 core + Biology Sec 3–4 core

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Pure Maths, Statistics, Vectors, Sequences, Complex Numbers

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Mechanics, Fields, Waves, Modern Physics, Quantum

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Physical, Inorganic, Organic Chemistry, Energetics

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Molecular Biology, Genetics, Ecology, Physiology

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01

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