Question

Find the LCM of $32,64$ and $128$

• A. 128
• B. 134
• C. 512
• D. 136

Answer 1

The correct option is A ($128$)

L.C.M of 32, 64, 128 is as follows:

$\begin{array}{cc}2& 32,64,128\\ 2& 16,32,64\\ 2& 8,16,32\\ 2& 4,8,16\\ 2& 2,4,8\\ 2& 1,2,4\\ 2& 1,1,2\\ & 1,1,1\end{array}$

Therefore, L.C.M of $32,64,128$ is $2\times 2\times 2\times 2\times 2\times 2\times 2=128$