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Q.

Find the square roots of the following numbers by the Prime Factorisation Method. 

(i) 729 (ii) 400 (iii) 1764

 (iv) 4096 (v) 7744 (vi) 9604 

(vii) 5929 (viii) 9216 (ix) 529 (x) 8100

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Detailed Solution

Finding the square root of the following by prime factorization method : 

(i) Square root of 729 by prime factorization method.

Question Image

Therefore, 

729= 3×3×3×3×3×3 =32×32×32 

729 =3×3×3 = 27

729 = 27

 

(ii)  Square root of 400 by prime factorization method.

Question Image

400= 2×2×2×2×5×5 =22×52×22 

400 =2×2×5 = 20

400 = 20

 

(iii) Square root of 1764 by prime factorization method.

Question Image

1764= 2×2×3×3×7×7 =22×32×72 

1764 =2×3×7 = 42

1764 = 42

 

(iv) Square root of 4096 by prime factorization method.

Question Image

4096= 2×2×2×2×2×2×2×2×2×2×2×2 =22×22×22×22×22×22 

4096 =2×2×2×2×2×2 = 64

4096 =  64

 

(v)  Square root of 7744 by prime factorization method.

Question Image

7744= 2×2×2×2×2×2×11×11 =22×22×22×112 

7744 =2×2×2×11 = 88

7744 =  88

 

(vi) Square root of 9604 by prime factorization method.

Question Image

9604= 2×2×7×7×7×7 =22×72×72 

9604 =2×7×7 = 98

9604 =  98

 

(vii) Square root of 5929 by prime factorization method.

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5929= 7×7×11×11=72×112 

5929 =7×11 = 77

5929 =  77

 

(viii) Square root of 9216 by prime factorization method.

Question Image

9216= 2×2×2×2×2×2×2×2×2×2×3×3=22×22×22×22×22×32 

9216 =2×2×2×2×2×3 = 96

9216 =  96

 

(ix) Square root of 529 by prime factorization method.

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529 = 23×23=232 

529 =23

529 =  23

 

(x) Square root of 8100 by prime factorization method.

Question Image

8100 = 2×2×3×3×3×3×5×5=22×32×32×52 

8100 =2×3×3×5

8100 =  90

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