Answer this question. It is maths question.
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The answer is the L.C.M of the 4,8,10 & 12 seconds.
therefore, the L. C. M is, 4 =1×2×2 ; 8=1×2×2×2 ; 10=1×2×5 ; 12=1×2×2×2×2×2×2×3
L.C.M = 1×2 = 2sec
Tey first ring together at 5 a.m
Hence,they ring together again,5:00+2 sec=5:00a.m.
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