1.

Using the prime factorisation method, find which of the following number are not perfect square 400​

Answer»

Answer:

the PRIME factors of each of the numbers as follows :

400 = 2 × 2 × 2 × 2× 5 × 5 = 2⁴ × 5²

The prime factors have even powers HENCE 400 is a PERFECT SQUARE.



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