SiLink Math PROTOTYPE
Stop losing marks you already know how to earn.
Two real questions, chain rule and normal approximation, wired to the real scoring engine.
MARKED LINE BY LINE2 / 4 MARKS
1
y = (3x²+1)⁵
✓
2
dy/dx = 5(3x²+1)⁴
✗
Chain rule structure understood. Inner derivative omitted.
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Both questions are marked by the real scoring engine.
LIVE · 2 QUESTIONS · MAB
DIFFERENTIATION · LINE LEDGER4 marks
Chain rule
Differentiate y = (3x² + 1)⁵
1
y = (3x²+1)⁵
✓
2
▌
Each line is checked as you write it.Start
DISTRIBUTIONS · STEP LADDER6 marks
Normal approximation to binomial
X ~ B(350, 0.35). Find P(X > 140)
M1
μ =
M1
σ =
Fill each step. Nothing is judged until you submit.Start
MARKS ✓ valid ✓° valid with a condition ⚠ risky ✗ does not follow — not judged
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Skill map
Eight states shown by fill pattern, not colour alone: solid · half · diagonal · grid · corner badge · double border · dashed · hollow. This build only has real evidence for "not enough evidence yet" vs a skill having live content — the other patterns are implemented and ready, not applied to invented mastery data.
Chain rule ⏱ 0:00 Tech-active
Differentiate
4 marks
ⓘ Differentiate
Normal approximation ⏱ 0:00
X ~ B(350, 0.35). Find P(X > 140). [6 marks]
B1
Model & conditions
Binomial ▾
M1
μ =
M1
σ =
M1
P(X>140) →P(Y> )
M1
z =
A1
P =
3 s.f.
–marks