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  1. Chapter 3 Class 6 Playing with Numbers
  2. Serial order wise

Transcript

Ex 3.2, 8 Which of the following numbers are prime? (a) 23Factors of 23 1 × 23 = 23 23 × 1 = 23 It has only 2 factors 1 and 23 So it is Prime Number Ex 3.2, 8 Which of the following numbers are prime? (b) 51Factors of 51 1 × 51 = 51 3 × 17 = 51 17 × 3 = 51 So Factors are 1, 3, 17, 51 It has more than 2 factors So it is not a prime number Ex 3.2, 8 Which of the following numbers are prime? (c) 37Factors of 37 1 × 37 = 37 37 × 1 = 37 It has only 2 factors 1 and 37 So it is a Prime number Ex 3.2, 8 Which of the following numbers are prime? (d) 26Factors of 26 1 × 26 = 26 2 × 13 = 26 13 × 2 = 26 So factors are 1, 2, 13, 26 It has more than 2 factors So it is not a Prime number

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.