SSC CGL Number System question with solution
Number SystemModerateSSC CGL 2024
The HCF and LCM of two numbers are 3 and 90 respectively. If one of the numbers is 15, what is the other number?
- (A)21
- (B)18
- (C)6
- (D)15
Correct answer: (B) 18
For any two numbers, product of the numbers = HCF × LCM. So the other number = (3 × 90) ÷ 15 = 270 ÷ 15 = 18.
Shortcut: Other number = HCF × LCM ÷ given number.
About this question
- Subject
- Quantitative Aptitude
- Topic
- Number System
- Exam
- SSC CGL 2024
- Attempts on SSC Rank
- Not attempted yet
Appears in: SSC CGL 2024 Tier 1 Question Paper — 10 September, Shift 1; SSC CGL 2024 Tier 1 Question Paper — 9 September, Shift 1
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Last reviewed on 5 Oct 2026. Spotted a mistake? See our correction policy.