Home›MPPSC Mains (Eng)›General Studies III›Part B: Science, Technology & Public Health›Unit 2: Computer Science›Mathematical Science: Numbers and its type, Methods of Unit Measurement, Equations and Factors, Profit loss, Percentage, Simple and Compound Interest, Ratio-Proportion›Find the largest three digit number, which will be completely

Find the largest three digit number, which will be completely divisible by number 8, 10 and 12.

20235M
Model Answer

Step-by-Step Mathematical Solution:

  1. Calculate Least Common Multiple (LCM) of 8, 10, and 12:
    Prime factorization: 8 = 2³, 10 = 2 × 5, 12 = 2² × 3
    LCM(8, 10, 12) = 2³ × 3 × 5 = 120
  2. Largest 3-Digit Number: 999
  3. Division of 999 by LCM (120):
    999 ÷ 120 = 8 with a remainder of 39 (999 = 120 × 8 + 39).
  4. Calculate Required Number:
    Required Number = 999 - 39 = 960

Final Answer: The largest three-digit number completely divisible by 8, 10, and 12 is 960.

हिंदी में प्रश्न एवं आदर्श उत्तर

तीन अंकों वाली सबसे बड़ी संख्या ज्ञात कीजिए जो 8, 10 और 12, से पूर्णतया विभाजित होगी।

हल:

  1. संख्याओं 8, 10 और 12 का लघुत्तम समापवर्त्य (LCM):
    8 = 2³
    10 = 2 × 5
    12 = 2² × 3
    LCM(8, 10, 12) = 2³ × 3 × 5 = 8 × 3 × 5 = 120
  2. तीन अंकों की सबसे बड़ी संख्या: 999
  3. 999 को 120 से विभाजित करने पर:
    999 = 120 × 8 + 39 (शेषफल = 39)
  4. अतः अभीष्ट सबसे बड़ी संख्या:
    999 - 39 = 960

उत्तर: तीन अंकों की सबसे बड़ी संख्या जो 8, 10 और 12 से पूर्णतः विभाजित है, 960 है।

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