Check sibling questions

Ex 3.2, 8 - Which numbers are prime? (a) 23 (b) 51 (c) 37 (d) 26

This video is only available for Teachoo black users

Ex 3.2, 8 - Chapter 3 Class 6 Playing with Numbers - Part 2

This video is only available for Teachoo black users

Ex 3.2, 8 - Chapter 3 Class 6 Playing with Numbers - Part 3

This video is only available for Teachoo black users

Ex 3.2, 8 - Chapter 3 Class 6 Playing with Numbers - Part 4

This video is only available for Teachoo black users

Get live Maths 1-on-1 Classs - Class 6 to 12


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

Ask a doubt
Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.