GCD using Step Diagram

Q.

How many positive integers between $1000$ and $9999$ inclusive are not divisible by either $5$ or $7$?

Q.

How many positive integers between $1000$ and $9999$ inclusive are divisible by either $5$ or $7$?

Q. Peter has $12$ pens, and Sheldon has $15$ pens. They wanted to make bundles of pens, having the same number of pens in each bundle. How many maximum possible pens can be included in each bundle if all the bundles are identical?

1. $4$
2. $5$
3. $3$
4. $2$

Q. Dino had $24$ dollars, and James had $36$ dollars. Each of them deposited equal amount of money in minimum number of banks. Given that both of them deposited the whole sum of money, they had. Which of the following statement is correct?

1. Dino deposited in 2 banks.
2. James deposited in 3 banks.
3. James deposited in 12 banks.
4. None of the above.

Q. A car dealer has $72$ BMW and $64$ Mercedes in his showroom. The dealer wants to arrange the cars in rows so that each row has the same number of vehicles of each type. What is the greatest possible number of rows that can be formed?

1. $18$
2. $6$
3. $8$
4. $24$

Q. Sum of GCD of 18 & 27 and 77 & 132 is

Q. What is the GCD of two numbers $56$ and $63?$
Evaluate using step diagram method.

1. $7$
2. $3$
3. $2$
4. $8$