RRB NTPC CBT-1 previous year question
What is the smallest 5-digit number that is exactly divisible by 12, 15 and 20?
Asked in RRB NTPC 2026 — 16 June Shift 2 · Quantitative Aptitude
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Correct answer: (B) 10020
LCM of 12, 15 and 20 is 60. The smallest 5-digit multiple of 60 is obtained by rounding 10000/60=166.67 up to 167, giving 167×60 = 10020.
हिंदी में प्रश्न
5-अंको की वह छोटी से छोटी संख्या ज्ञात कीजिए, जो 5 12, और 15 से पूर्णतः विभाज्य हो।
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सही उत्तर: (B) 10080
12, 15 और 20 का लघुत्तम समापवर्त्य 60 है। 60 का सबसे छोटा 5-अंकीय गुणज 10000/60=166.67 को 167 तक पूर्णांकित करने पर 167×60 = 10020 मिलता है।
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