Question
What is the Highest Common Factor of 0.42, 0.60 and 0.78?
Asked in SSC GD Constable · 2026
LCM and HCF · Quantitative Aptitude
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If two numbers are multiples of a common value x, factor out x first. For numbers ax and bx, their HCF is x X HCF(a,b).
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Questions Asked from HCF: Prime Factorisation & Euclidean Algorithm in Previous Exams
See how often HCF: Prime Factorisation & Euclidean Algorithm has appeared in previous-year questions across major government exams.
15UPSC Questions Asked in These Years:2010, 2011, 2012, 2013, 2014, 2015, 2016, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2026
9SSC Questions Asked in These Years:2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
8Railways Questions Asked in These Years:2016, 2018, 2021, 2022, 2023, 2024, 2025, 2026
15State PSC Questions Asked in These Years:2002, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
HCF: Prime Factorisation & Euclidean Algorithm has appeared in 47 previous-year exam questions, most frequently in UPSC, State PSC and SSC.
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