Question

Can anyone show how to find LCM of two whole numbers mentally?

Answer 1

If you are having even numbers in the denominator then it's LCM would be the biggest number you are having .
For example-
$7 \div 2 + 9 \div 6$
then it's LCM will be 6..



Hope you like it....

Answer 2

HEY DEAR______❤️❤️❤️❤️❤️❤️
HERE IS YOUR ANSWER:-
=>YOU KNOW VERY WELL THAT L.C.M. IS THE PRODUCT OF THE ALL BIGGER VALUES OR FACTORS.
FOR EXAMPLE, LCM OF 48 AND 16

=>>>>>>=>48 = 2 x 2 x 2 x 2 x 3
=>>>>>>=>16 = 2 x 2 x 2 x 2

SO WE CAN WRITE THEM AS

=>>>>>>>>=>48 = (2)^4 x (3)^1
=>>>>>>>>=>16 = (2)^4
SO,LCM WILL BE :-
CHOOSE THE BIGGEST VALUES IN BOTH

=>WE GET (2)^4 AND (3)^1

NOW MULTIPLY THEM

=>>=>(2)^4 x (3)^1
=>>=> 16 x 3
=>>=> 48
SO LCM = 48

BUT OF YOU WANT TO FIND IT MENTALLY THEN:-
=>1.TRY TO FIND THAT THE BIGGER NUMBER IS A MULTIPLE OF SMALLER NUMBER OR NOT.
IF THE BIGGER NUMBER IS A MULTIPLE THEN THE LCM WILL BE THE BIGGER NUMBER ITSELF.

=>2.IN CASE IF IT IS NOT A MULTIPLE OF SMALLER NUMBER THEN JUST MULTIPLY THE BOTH NUMBERS THEN THE PRODUCT WILL BE LCM OF THE NUMBERS.

===>YOU CAN USE THESE TWO METHODS EASILY.

ONE MORE FORMULAE FOR YOU:-
=>IF YOU WANT TO FIND A NUMBER FROM TWO NUMBERS WHOSE LCM AND HCF ARE ALSO GIVEN:-

=> FIRST NUMBER x SECOND NUMBER = LCM x HCF OF THE NUMBERS

HOPE IT WILL HELP YOU!!!!
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