GCD using Factor Tree

Q.

Find the greatest number which is factor of $504$, $792$ and $1080$.

Q.

Prime factors of $640$.

Q. Find the GCD of $42$ and $24$ using Factor Tree.

1. $1$
2. $2$
3. $3$
4. $6$

Q. There are $21$ pencils and $14$ erasers that need to be packed in pencil boxes. Each pencil box must have equal number of pencil and eraser. Find the maximum number of such boxes.

Q. Two friends, Jacob and Logan, went into the physical education field in the evening. Jacob decided to complete 8 rounds of a circular track and Logan decided to complete 4 rounds of the same circular track in same time. Find the maximum number of times they will meet each other after starting. Assume that both of them had constant running speed.

1. 1
2. 2
3. 3
4. 4

Q. Evaluate the GCD of 144 and 108 using Factor Tree.

Q. GCD of two numbers is $5.$ If one number is $125$ and another number is a multiple of $3,$ find the possible number(s) using Factor Tree.

1. $3$
2. $15$
3. $30$
4. $75$