Question

4. Using prime factorisation method, find which of the following are perfect squares?
169, 170, 189, 2048, 2916, 3549
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Answer 1

Step-by-step explanation:

1. prime factorisation of 169 = 13×13 =13^2
2. prime factorisation of 170=2×5×17
3. prime factorisation of 189=3×3×3×7
4. prime factorisation of 2048=2×2×2×2×2×2×3×13= 2^5×13×3
5. prime factorisation of 2916= 2×2×3×3×3×3×3×3=2^2×3^6
6. prime factorisation of 3549=3×7×21×13×273

Answer 2

Answer:

13 is not a perfect squares