Question

Q4. The square of which of the following would be odd number?
( a) 431 ( b) 272 ( c) 1234 ( d ) 7928

Answer 1

Answer : a (431)

Explanation :

Since, We need whether square of a number is odd or even, We use this small property.

• Square of every odd number is odd.

• Square of every even number is even.

From the given options,

( a) 431 - odd

( b) 272 - even

( c) 1234 - even

( d ) 7928 - even

So, It's evident that Square of 431 would be odd since 431 is odd.

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We know that, We can decide a number is odd or even by looking at its unit digit.

So, Any number whose unit digit is divisible by 2, will be even. And numbers whose unit digits won't be divisible by 2 are odd.

Also, Square of a number will contain a unit digit that is actually the square of unit digit in the actual number.

So,

Option - A, 431

Unit digit = 1

Unit digit is square = 1² = 1

Since 1 is not divisible by 2, Square of 431 is odd number.

Answer 2

Answer:

431

Step-by-step explanation:

ok it is correct answer