Question

If a and b are odd numbers,then which of the following is even? A)a+b B)a+b+1 C)ab D)ab+2 E) none of above

Answer 1

Answer:

Step-by-step explanation:

Adding 2 odd numbers give you an even number

Assuming A as 3and B as 5

a+b=3+5

a+b = 8

Answer 2

Answer:  The correct option is (A) a + b.

Step-by-step explanation:  We are given to select the expression that is even if a and b are odd numbers.

We know the following rule :

odd + odd = even,

even + even = even,

odd + even = odd,

even + odd = odd,

odd × odd = odd.

(A) The given expression is

a + b = odd + odd = even.

(B) The given expression is

a + b + 1 = odd + odd + odd = even + odd = odd.

(C) The given expression is

ab = odd × odd = odd.

(D) The given expression is

ab + 2 = odd × odd + 2= odd + even = odd.

Thus, the correct option is (A) a+b.