NCERT Class 10 Solutions: Real Numbers (Chapter 1) Exercise 1.2 –Part 1

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Q-1 Express each number as product of its prime factors:

  1. 140

  2. 156

  3. 3825

  4. 5005

  5. 7429

Solution:

  1. 140

    140=2×70

    =2×2×35

    =2×2×5×7

    =22×5×7

    Given the number is 140 and find its prime factors

    Given the Factor of 140

    Given the number is 140 and find its prime factors

  2. 156

    156=2×78

    =2×2×39

    =2×2×13×3

    =22×3×13

    Given the number is 156 and find its prime factors

    Given the Factor of 156

    Given the number is 156 and find its prime factors

  3. 3825

    3825=3×1275

    =3×3×425

    =3×3×5×85

    =3×3×5×5×17

    32×52×17

    Given the number is 3825 and find the its prime factors

    Given the Number Is 3825 and Its Factors

    Given the number is 3825 and find the its prime factors

  4. 5005

    5005=5×1001

    =5×7×143

    =5×7×11×13

    Given the number is 5005 and find the its prime factors

    Given the Prime Factors of 5005 Number

    Given the number is 5005 and find the its prime factors

  5. 7429

    7429=17×437

    =17×19×23

    Given the number is 7429 and find the prime factors

    Given the Prime Factoe of 7429 Number

    Given the number is 7429 and find the prime factors

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