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  1. Chapter 3 Class 6 Playing with Numbers
  2. Serial order wise
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Ex 3.5, 6 Find all the prime factors of 1729 and arrange them in ascending order. Now state the relation, if any; between two consecutive prime factors.To find the factors, we do Prime factorization of 1729 1729 = 7 × 13 × 19 So, factors are 7, 13, 19 Here, difference between two factors is 6 Rough Here, 1729 is not divisible by 2, 3, 5. So, we try with 7 Here, 247 is not divisible by 7 or 11. So, we try with 13. 19 is a prime number So, we divide it by 19 1729 divided by 7 is 247 247 cannot be divided by 7 247 divided by 13 is 19

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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 8 years. He provides courses for Practical Accounts, Taxation and Efiling at teachoo.com .