Question

If y is odd, then ($y^2$ + 3) is a

• A. odd number
• B. even number
• C. negative number
• D. perfect square

Answer 1

The correct option is B even number

3 is odd, $3^2$ = 9 is also odd hence 9 + 3 = 12 which is even

Square of odd number will be always odd as it is product of two odd numbers
and sum of two odd numbers is a even number