Last updated at Dec. 16, 2024 by Teachoo
We find factors of 4 & 18 separately
So, Common factors of 4 & 18 are 1, 2
We find factors of 4 & 15 separately
So, Common factors of 4 & 15 are 1
Note:
If two numbers have common factor 1
Then, they are co-prime numbers
Factors of 4 1 × 4 = 4 2 × 2 = 4 4 × 1 = 4 We stop here as 1 & 4 have occurred earlier So factors of 4 are 1, 2, 4 Factors of 18 1 × 18 = 18 2 × 9 = 18 3 × 6 = 18 6 × 3 = 18 We stop here as 6 & 3 have occurred earlier So factors of 18 are 1, 2, 3, 6, 9, 18 Factors of 4 1 × 4 = 4 2 × 2 = 4 4 × 1 = 4 We stop here as 1 & 4 have occurred earlier So factors of 4 are 1, 2, 4 Factors of 15 1 × 15 = 15 3 × 5 = 15 5 × 3 = 15 We stop here as 3 & 5 have occurred earlier So factors of 15 are 1, 3, 5, 15
About the Author
Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo