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Four bells ring at intervals of 6, 8, 12 & 20 minutes. They ring simultaneously at 7 a.m. At what time will they ring together?
  • a)
    8 a.m.
  • b)
    9 a.m.
  • c)
    10 a.m.
  • d)
    9:30 a.m. 
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Four bells ring at intervals of 6, 8, 12 & 20 minutes. They ring s...
Required time = LCM of 6, 8, 12 and 20

∴ Required time = 2 × 2 × 3 × 2 × 5
= 120 minutes = 2 hr.
∴ bell will again ring together at (7 + 2)
= 9 a.m.
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Community Answer
Four bells ring at intervals of 6, 8, 12 & 20 minutes. They ring s...
Required time =LCM of 6,18,12,20,
2|6, 8,12,20,
2|3,4, 6,10
3|3, 2,3,5,
1,2,1,5
required time=2×2×3×2×5
=120 minutes=2hrஃ bell will again ring together at(7+2) =9 am.
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Four bells ring at intervals of 6, 8, 12 & 20 minutes. They ring simultaneously at 7 a.m. At what time will they ring together?a)8 a.m.b)9 a.m.c)10 a.m.d)9:30 a.m.Correct answer is option 'B'. Can you explain this answer? for Class 6 2025 is part of Class 6 preparation. The Question and answers have been prepared according to the Class 6 exam syllabus. Information about Four bells ring at intervals of 6, 8, 12 & 20 minutes. They ring simultaneously at 7 a.m. At what time will they ring together?a)8 a.m.b)9 a.m.c)10 a.m.d)9:30 a.m.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 6 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Four bells ring at intervals of 6, 8, 12 & 20 minutes. They ring simultaneously at 7 a.m. At what time will they ring together?a)8 a.m.b)9 a.m.c)10 a.m.d)9:30 a.m.Correct answer is option 'B'. Can you explain this answer?.
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