LIC AAO Prelims practice question
Find the LCM of 35, 42, 60 and 80.
From a LIC AAO Prelims Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (D) 1680
Prime factorise: 35 = 5 × 7; 42 = 2 × 3 × 7; 60 = 22 × 3 × 5; 80 = 24 × 5. LCM takes every prime at its highest power: 24 × 3 × 5 × 7 = 1680.
हिंदी में प्रश्न
35, 42, 60 और 80 का ल.स. (LCM) ज्ञात कीजिए।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (D) 1680
अभाज्य गुणनखंडन: 35 = 5 × 7; 42 = 2 × 3 × 7; 60 = 22 × 3 × 5; 80 = 24 × 5। ल.स. में प्रत्येक अभाज्य की उच्चतम घात ली जाती है: 24 × 3 × 5 × 7 = 1680।
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