Question

Three boys step off together from the same spot. Their steps measure $63cm,70cm$ and $77cm$ respectively. What is the minimum distance each should cover so that all can cover the distance in complete steps ?

Answer 1

Step measure of $1$ boy = $63cm$
Step measure of $2$ boy = $70cm$
Step measure of $3$ boy = $77cm$
LCM of $63,70,77$
$LCM=2\times 3\times 3\times 5\times 7\times 11=6930$
hence the minimum distance each should cover so that all can cover the distance in complete steps in$6930Cm$