Question

The square root of which of the following number is not a prime number ( a) 289.(b) 361.( c) 529.( d) 441.
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Answer 1

Given:

(a) 289

(b) 361

(c) 529

(d) 441

To find:

The square root of which of the given numbers is not prime number.

Solution:

The square root of the number

• √289 = 17 ( This is a prime number)
• ​√361 = 19 ( This is a prime number)
• √529 = 23 ( This is a prime number)
• √441 = 21 ( This is not a prime number)

From the above given numbers, 21 is not the prime number.