Ratios and Proportional Sharing
Interpret part-to-part and part-to-whole relationships and allocate totals proportionally.
How to prepare for the CSNT
Use 601 original multiple-choice questions to extract the right values, preserve units and precision, and verify each calculation. The bank is independent practice based only on public skill descriptions; it contains no recalled or secure test items.
Core concepts
Concept 1
ratio notation
Exam cue: Identify what each ratio term represents before scaling.
Concept 2
equivalent ratios
Exam cue: For a shared total, add the ratio parts before finding one part.
Concept 3
ratio shares
Concept 4
part-to-whole relationship
Risk pitfalls and guardrails
Treating a part-to-part ratio as a fraction of the whole without adding the parts.
Guardrail: Do not copy official questions, invent a fixed test length or weighting, ignore units, round too early, infer score from difficulty or rely on returning to an earlier item.
Scaling one side of a ratio but not the other.
Guardrail: Do not copy official questions, invent a fixed test length or weighting, ignore units, round too early, infer score from difficulty or rely on returning to an earlier item.
Memory anchors
Label every ratio term
Know which quantity each part represents.
Total ratio parts
Add the parts before sharing a total.
One part first
Divide the total by the sum of ratio parts.
Scale together
Equivalent ratios multiply or divide every term equally.
Recombine to check
Calculated shares should return the original total.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
A £900 fund is shared between Teams A and B in the ratio 2:3. How much does Team A receive?
Files are allocated to two offices in the ratio 5:7. If the smaller office receives 180 files, how many does the larger receive?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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