Question
If the ratio of two numbers is 3 : 8, and their HCF is 6, then their LCM is:
Asked in RRB NTPC (UG) CBT-I · 2026
LCM and HCF · Quantitative Aptitude
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If two numbers are written as \(ax\) and \(bx\), and \(a\) and \(b\) are co-prime, their LCM is \(abx\).
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Questions Asked from LCM: Prime Factorisation & The Ladder Method in Previous Exams
See how often LCM: Prime Factorisation & The Ladder Method has appeared in previous-year questions across major government exams.
15UPSC Questions Asked in These Years:2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2022, 2023, 2024, 2026
9SSC Questions Asked in These Years:2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
7Railways Questions Asked in These Years:2016, 2018, 2021, 2022, 2024, 2025, 2026
16State PSC Questions Asked in These Years:2002, 2004, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
LCM: Prime Factorisation & The Ladder Method has appeared in 47 previous-year exam questions, most frequently in State PSC, UPSC and SSC.
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