Ex 3.4, 5 Which of the following numbers are co-prime? (d) 17 and 68 Factors of 17
1 × 17 = 17
17 × 1 = 17
We stop as 1 & 17 have occurred earlier
So, factors of 17 are 1 and 17
Factors of 68
1 × 68 = 68
2 × 34 = 68
4 × 17 = 68
17 × 4 = 68
We stop as 17 and 4 have occurred earlier
So factors of 68 are 1, 2, 4, 17, 34, 68
So, common factors are 1, 17
Since common factors are other than 1,
They are not co-prime numbers
Made by
Davneet Singh
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
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