SSC CGL Number System question with solution
Number SystemModerateSSC CGL 2024
The HCF and LCM of two numbers are 3 and 63 respectively. If one of the numbers is 9, what is the other number?
- (A)18
- (B)21
- (C)24
- (D)7
Correct answer: (B) 21
For any two numbers, product of the numbers = HCF × LCM. So the other number = (3 × 63) ÷ 9 = 189 ÷ 9 = 21.
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 2 Question Paper — 18 January, Shift 1; SSC CHSL 2024 Tier 1 Question Paper — 2 July, Shift 1; SSC MTS 2024 Computer Based Examination Question Paper — 30 September, Shift 1
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Last reviewed on 5 Oct 2026. Spotted a mistake? See our correction policy.