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Six bells commence tolling together and toll at intervals of 3, 6, 9, 12, 15 and 18 seconds respectively. In 30 minutes, how many times do they toll together?

Options

A.4
B.10
C.11
D.15

Correct Answer

C. 11

Exam
Bihar CGL
Language
English
Subject
Reasoning & Mental Ability
Topic
Logical Reasoning
Year
2011
Difficulty
1/5
Section
Comprehension, Logical Reasoning & Mental Ability

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