Question

(3x + 7) is an even number. What will be the square of 'x' from the following
options?
(1) Odd number
(2) Even number
(3) Prime number
(4) Twin prime number​

Answer 1

Answer:

(1) Odd number

Step-by-step explanation:

We know that the square of an odd number is always an odd number and in order to (3x+1) being an even number, x must be an odd number. We can verify this by taking various values of x.

1. Let x be 1. Then, 3x+7 = 3×1 + 7

= 3+7 = 10, which is an even number.

And, 1^2 = 1, which is an odd number.

2. Let x be 2. Then, 3x+7 = 3×2 + 7

= 6+7 = 13, which is an odd number.

Thus, verified.

Hope this helps