Common Factor

Q. How many common factors do 42 and 49 have?

1. 3
2. 2
3. 4
4. 7

Q.

Is there a number which has no factors?

Q. One of the common factors of 25 and 30 is .

1. 2
2. 5
3. 10

Q.

Find the HCF of $255$ and $867$

Q. Find the common factors of 12, 72 and 96.

1. 1, 2, 3, 4 and 6
2. 1, 2, 3, 4, 5 and 6
3. 1, 2, 4 and 6
4. 1, 2, 3, 4 and 8

Q. The common factors of 15 and 60 are _____.

1. 1, 3, 9 and 15
2. 1, 2, 3, 9 and 15
3. 1, 3, 5 and 15
4. 1, 5, 10 and 15

Q. Which of the following is a common factor of 20 and 45?

1. 15
2. 5
3. 45
4. 9

Q. How many factors are in common for the numbers 28 and 32?

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

Q. 5 is a common factor of 15 and 25.

1. False
2. True

Q. If you have to choose between ladders of lengths 5, 10, and 15 meters to reach the 15th and the 30th floor as soon as possible, which ladder you'll choose?

1. None of them is useful
2. 15 meters
3. 10 meters
4. 5 meters

Q. Find the two numbers who have 1, 2, 3, 4 and 6 as common factors.

1. 12
2. 28
3. 36
4. 50

Q. One of the common factors of 25 and 30 is .

1. 2
2. 5
3. 10

Q. Find the common factors of $20$ and $28$

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

Q. Which of the following is one of the common factors of 12 and 6?

1. 3
2. 4
3. 7
4. 9

Q.

Determine the HCF of following pairs by finding factors:

(a) $5$ and $10$

Q. Which part of the given diagram represents the common factors of 165, 42 and 30.

1. 
2. 
3. 
4. 
5. 

Q.

Which of the following pairs of numbers have the common factor as 5?

1. 5, 24
2. 13, 45
3. 25, 45
4. 9, 16

Q. Raman has to split 12 balls into different groups with equal number of balls in each group. In how many ways can he form these groups?

1. 3
2. 4
3. 5
4. 6

Q. The smallest common factor for every number is .

1. 1
2. 2
3. \N

Q. Write the factors of 25 in the red circle and the factors of 35 in the blue circle.



Which are the factors you have written in the common part (purple) of both circles? These are common factors of 25 and 35.

Q.

What are the factors of $18,19$ and $200$?

Q. Which of the following pair of numbers have 1as their only common factor?

1. 75, 36
2. 15, 17
3. 18, 6
4. 10, 45

Q. Which of the following pair of numbers have 5 as their common factor?

1. 5, 24
2. 13, 45
3. 25, 45
4. 9, 16

Q.

Find the common factors of $24$ and $30$.

Q.

Find the common factors of

$12$ and $15$

Q. How many common factors do 24 and 48 have?

1. 10
2. 4
3. 9
4. 8

Q. One of the common factors of 25 and 30 is .

1. 2
2. 5
3. 10

Q.

Find the common factors of $5$, $12$ and $25$.

Q. Nisha has 20 chocolates while Anish has 30. How many equal number of groups they can make by dividing their chocolates seperately and completely?

1. 10
2. 8
3. 5
4. 4

Q. What are all the greatest common factors of $36$ and $90$?