Case study·Hard exam skill (4/5)·No calculatorNeeds mentor review
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Question
A label is formed using one letter from followed by two distinct digits from
Total: 4 marks
(a) How many labels are possible? (1 mark)
(b) How many labels have as the first digit after the letter? (1 mark)
(c) How many labels use the digits and in some order? (2 marks)
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