Lowest Common Multiple

Find the LCM of the following numbers: $15$ and $4$.

Observe a common property in the obtained LCM. Is LCM the product of the given two numbers?

Find the LCM of the following numbers: $6$ and $5$.

Observe a common property in the obtained LCM. Is LCM the product of the given two numbers?

Find the LCM of the following numbers: $12$ and $5$

Observe a common property in the obtained LCM. Is LCM the product of the given two numbers?

Find the LCM of the following numbers: $9$ and $4$.

Observe a common property in the obtained LCM. Is LCM the product of the given two numbers?

Find the LCM of the numbers $9, 45$ in which one number is the factor of the other. What do you observe in the result obtained?

Find the LCM of the numbers $12, 48$ in which one number is the factor of the other. What do you observe in the result obtained?

Find the LCM of the numbers $6, 18$ in which one number is the factor of the other. What do you observe in the result obtained?

Find the LCM of the numbers $5, 20$ in which one number is the factor of the other. What do you observe in the results obtained?

Three boys step off together from the same spot. Their steps measure $63 \mathrm{c}\mathrm{m},70 \mathrm{c}\mathrm{m}$ and $77 \mathrm{c}\mathrm{m}$ respectively. If the minimum distance each should cover so that all can cover the distance in complete steps is $A \mathrm{cm}$, then find the value of $A$

Find the least number which when divided by $6, 15$ and $18,$ leave remainder $5$ in each case.

Find the smallest $4$-digit number which is divisible by $18, 24$ and $32$ .