a boy was asked to find the LCM of 3,5,12 and another number. but while calculating,he wrote 21 instead of 12 and yet came with the correct answer. what could be the fourth number?
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let the no be x
and LCM.be y
then LCM of 3,5,12 and x as well as LCM of 3,5,21 and x is y
which means that y is divisible by 12 as well as 21 so y can be 120
so now we must find the value of x such that in both cases we get LCM as 120
so x can be 120 itself.
and LCM.be y
then LCM of 3,5,12 and x as well as LCM of 3,5,21 and x is y
which means that y is divisible by 12 as well as 21 so y can be 120
so now we must find the value of x such that in both cases we get LCM as 120
so x can be 120 itself.
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