HCF & LCM
SSC CGL · Quantitative Aptitude · 10 practice questions with answers and explanations: 0 Easy, 5 Medium, 5 Hard.
Sample questions
Sample Medium question 1
The HCF of two numbers is 8 and their LCM is 48. If one number is 16, find the other.
- 24
- 12
- 48
- 32
Show answer
Answer: A. The product of the numbers is 8 × 48 = 384, so the other number = 384 ÷ 16 = 24.
Sample Hard question 2
Two numbers are in the ratio 3 : 5 and their LCM is 225. Find their HCF.
- 25
- 5
- 15
- 9
Show answer
Answer: C. Let the numbers be 3k and 5k. Their LCM is 15k = 225, so k = 15, which is also the HCF.
More Quantitative Aptitude topics for SSC CGL
- Algebra
- Average
- Boats & Streams
- Data Interpretation
- Geometry
- Height & Distance
- Mensuration
- Mixture & Alligation
- Number System
- Partnership
- Percentage
- Problems on Ages
- Problems on Trains
- Profit/Loss & Discount
- Ratio & Proportion
- Simple & Compound Interest
- Simplification & Approximation
- Surds & Indices
- Time & Work / Pipes & Cisterns
- Time, Speed & Distance
- Trigonometry