Question

Four bells toll after an interval of 8, 9 ,12 and 15 seconds respectively. When will they toll again
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Answer 1

$\bf{\underline{\underline{\bigstar\bigstar \: Solution :}}}$

$\:\:\:$

$\footnotesize{L.C.M \: of \: 8,9,12 \: and \: 15 \: seconds = time \: after\: bell \: toll \: together }$

$\footnotesize{\implies 360 \: seconds = time \: after\: bell \: toll \: together }$

$\footnotesize{\implies 6 \: minutes = time \: after\: bell \: toll \: together }$