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Suneung-style Maths Practice Questions
Original practice questions for the Korean CSAT (Suneung)-style Mathematics practice (Practice in the style of the KICE College Scholastic Ability Test; not affiliated), mixed across 3 topics with instant answers and explanations. Practise by topic below or take the timed mock test.
Suneung-style Maths mixed practice
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Q1.AlgebraFind the sum of the first 25 terms of the AP 11, 13, 15, …
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Answer: C — 875
Sₙ = n/2 × [2a + (n − 1)d] = 25/2 × [22 + 48] = 875.
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Q2.Probability & CombinatoricsIn how many ways can the letters of the word MOTHER be arranged?
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Answer: C — 720
All 6 letters are different, so arrangements = 6! = 720.
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Q3.Geometry & MensurationFind the area of a right triangle with legs 20 cm and 21 cm.
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Answer: D — 210 cm²
Area = ½ × base × height = ½ × 20 × 21 = 210 cm².
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Q4.AlgebraFind the sum of the first 24 terms of the AP 7, 13, 19, …
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Answer: D — 1824
Sₙ = n/2 × [2a + (n − 1)d] = 24/2 × [14 + 138] = 1,824.
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Q5.Probability & CombinatoricsIn how many ways can the letters of the word PENCIL be arranged?
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Answer: B — 720
All 6 letters are different, so arrangements = 6! = 720.
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Q6.Geometry & MensurationFind the volume of a sphere of radius 7 cm.
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Answer: D — 1,436.76 cm³
Using (4/3)πr³ with π = 3.1416: 1,436.76 cm³.
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Q7.AlgebraSolve: x² + 3x − 18 = 0
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Answer: C — -6, 3
Find two roots with sum -3 and product -18: -6 and 3. So x² + 3x − 18 = (x + 6)(x − 3) = 0.
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Q8.Probability & CombinatoricsIn how many ways can a committee of 2 be chosen from 11 people?
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Answer: A — 55
Order does not matter → combinations: 11C2 = 11! / (2!·9!) = 55.
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Q9.Geometry & MensurationA right triangle has legs 8 cm and 15 cm. Find the hypotenuse.
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Answer: C — 17 cm
By Pythagoras, hypotenuse = √(8² + 15²) = √289 = 17.
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Q10.AlgebraFind the sum of the first 25 terms of the AP 11, 18, 25, …
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Answer: B — 2375
Sₙ = n/2 × [2a + (n − 1)d] = 25/2 × [22 + 168] = 2,375.
About Suneung-style Maths
Korean CSAT (Suneung)-style Mathematics practice — conducted by Practice in the style of the KICE College Scholastic Ability Test; not affiliated. Practice in the style of South Korea’s university entrance maths: sequences, functions and probability.
Original practice questions written for this site in the style and difficulty of each exam’s syllabus. They are not past papers and the site is not affiliated with any exam body. Exam patterns, marking schemes and syllabi change — always check the latest official notification.
Practise by topic
- Algebra questions — Factorise quadratics by finding two numbers with the right sum and product; check roots by substitution.
- Probability & Combinatorics questions — Probability = favourable ÷ total outcomes.
- Geometry & Mensuration questions — Memorise core formulas (circle πr², triangle ½bh, Pythagoras, distance √((x₂−x₁)² + (y₂−y₁)²)).
- Suneung-style Maths mock test — 25 timed questions.
Suneung-style Maths practice topics
| Topic | Section | Question source |
|---|---|---|
| Algebra | Mathematics | Calculated (new numbers every set) |
| Probability & Combinatorics | Mathematics | Calculated (new numbers every set) |
| Geometry & Mensuration | Mathematics | Calculated (new numbers every set) |