Question

​​1)Find the L.C.M. of the given numbers by prime factorization method :-
{i} 28,98 {ii}36,40,126
2)Find the L.C.M. of the given numbers by division method :-
{ii} 12,32 {ii} 480,672

Answer 1

Dear student
$$\begin{gathered} Ques1 \\ 36,40 \\ Factorsof36=2\times 2\times 3\times 3 \\ Factorsof40=2\times 2\times 2\times 5 \\ So,LCM=2\times 2\times 2\times 3\times 3\times 5\times 7=2520 \\ HCF=2\times 2=4 \end{gathered}$$
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