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20 questions · No time limit
20 marks · +1 per question
Attempt this review after the four Ratios Percentages and Commercial Comparisons lessons. Each of the 20 independent questions has exactly one correct option and is worth one mark. This original learning review is free and untimed: +1 for correct, 0 for incorrect or unattempted, no negative marking and no pass cutoff. Five questions per lesson are a coverage choice, not predicted RRB exam weighting. This is not a full CBT simulation. Write a named base, invariant or short calculation before reading the answer key. Unless a question says otherwise, price comparisons use the stated positive total cost as the profit/loss base and marked price as the discount base. Read every fixed-rate and unit condition in the individual question.
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