Unit 1: Number and Algebra
Topic 1.2: Arithmetic Sequences and Series Questions
Practice 20 exam-style questions for IB Math AI SL Topic 1.2. Review the question stems below, then unlock the full Question Bank to access markschemes, model answers, and AI grading.
1find3 marks
A club records the number joining each week as 16, 20, 24, 28, ...
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A savings account starts at 1000 dollars and gains 50 dollars each year with simple interest.
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An arithmetic sequence has first term 12, common difference 5, and 18 terms.
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The arithmetic sequence is 3, 7, 11, 15, ...
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A student says a real-life data set must have exactly equal differences before you can use an arithmetic model.
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A gym fee is 40 dollars in week 1, 45 dollars in week 2, 50 dollars in week 3, and so on.
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Write as a normal sum and find its value.
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A student says that 3, 6, 12, 24, ... is arithmetic because it increases each time.
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A bike rental costs 18 dollars for the first hour and rises by 4 dollars for each extra hour.
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Why might you find the last term first before summing an arithmetic series?
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What is the common difference of 30, 24, 18, 12, ...?
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A plant grows 6 cm in week 1, 9 cm in week 2, 12 cm in week 3, and so on.
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A student expands as 1 + 2 + 3 + 4.
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