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SSC JE Number System & Simplification Questions
Practise number system & simplification (quantitative aptitude) for the SSC Junior Engineer Examination: 10 multiple-choice questions, each with the correct answer and a worked explanation. Click an option to check it, or “New questions” for another set.
Number System & Simplification practice
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Q1.What is √484?
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Answer: A — 22
22 × 22 = 484, so √484 = 22.
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Q2.Simplify: 64 + 4 × 7 − 9
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Answer: A — 83
BODMAS: multiply first — 4 × 7 = 28; then 64 + 28 − 9 = 83.
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Q3.What is √3,481?
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Answer: D — 59
59 × 59 = 3481, so √3481 = 59.
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Q4.Find the next number in the series: 5, 9, 13, 17, 21, ?
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Answer: D — 25
Each term increases by 4.
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Q5.Find the next number in the series: 4, 12, 36, 108, 324, ?
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Answer: C — 972
Each term is multiplied by 3.
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Q6.Find the HCF of 48 and 12.
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Answer: A — 12
HCF(48, 12) = 12. Check: HCF × LCM = 12 × 48 = 576 = product of the numbers.
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Q7.Find the next number in the series: 2, 4, 8, 16, 32, ?
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Answer: A — 64
Each term is multiplied by 2.
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Q8.Find the next number in the series: 1, 3, 9, 27, 81, ?
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Answer: A — 243
Each term is multiplied by 3.
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Q9.Simplify: 94 + 10 × 9 − 17
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Answer: C — 167
BODMAS: multiply first — 10 × 9 = 90; then 94 + 90 − 17 = 167.
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Q10.Find the LCM of 48 and 40.
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Answer: A — 240
LCM(48, 40) = 240. Check: HCF × LCM = 8 × 240 = 1920 = product of the numbers.
How to approach number system & simplification questions
Learn squares to 30 and cubes to 15, apply BODMAS strictly, and use HCF × LCM = product of two numbers. For series, check the differences first, then the ratios.
About SSC JE
SSC Junior Engineer Examination — conducted by Staff Selection Commission (SSC). Recruits civil, mechanical and electrical Junior Engineers; the general sections cover reasoning and awareness.
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.
SSC JE practice topics
| Topic | Section | Question source |
|---|---|---|
| Physics | Science | Calculated + question bank |
| Number System & Simplification | Quantitative aptitude | Calculated (new numbers every set) |
| Logical Reasoning | Reasoning | Calculated (new numbers every set) |
| Indian Polity, History & Geography | General awareness | Question bank |