Response Structuring for Multi-part IB Maths Questions
IB Maths questions build. Part (a) feeds part (b) which sets up part (c). Miss the structural pattern and you lose 3-5 marks in a single question — the difference between a 5 and a 7 on Paper 2 alone. This skill teaches you to hit every mark, even when you get stuck.
Why it matters
- “Hence” is worth up to 3 marks — but only if you actually use the previous result. Re-deriving from scratch loses the mark on principle.
- In Paper 3, every question is 20+ marks split into 5-8 parts. The correlation between structure-awareness and final Paper 3 score is stronger than any topic skill.
- Even when part (b) defeats you, part (c) is independently markable. Never leave a later part blank because an earlier one broke.
Examiner signals
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“Hence …” vs “Hence, or otherwise …”The bare “Hence” demands you use the previous answer. “Hence, or otherwise” is a hint — use the earlier work if you can, but a fresh approach still scores full.
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“Show that X = k” followed by “Hence find …”Treat X = k as GIVEN in the follow-up. Do not re-derive. Substitute it into the later expression as if the mark scheme wrote it for you.
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Final-answer clarityUnderline / box every final answer, e.g.
x = 4on its own line. Markers scanning 200 papers a day miss answers buried in prose. Give them a bright landing zone.
Interactive fluency practice for Response Structuring for Multi-part IB Maths Questions
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FAQ
What should I do if I can't do part (a) of a multi-part question?
Move on. Read part (b) — sometimes it gives you the answer to (a) or lets you assume it. If (a) says “show that X = 5”, you can use X = 5 in (b) and (c) without ever proving it. That earns you (b) and (c) marks even with (a) blank.
How do I know when to use ‘Hence’ vs restart from scratch?
If the question says “Hence” (without “or otherwise”), you must use the previous result — otherwise you lose the mark. If it says “Hence, or otherwise”, use the previous result when it saves time; go fresh only when the earlier answer is definitely wrong.
How much working should I show for method marks?
Enough that a marker can follow your logic in 5 seconds. Every M1 mark in the scheme is a distinct step. Write one line per step, label your variables, and quote formulae from the IB formula booklet by name (“using the compound interest formula”). Investigative logic must be visible.