Odd And Even Numbers - 2

Logic Level 1

Given that $a$ , $b$ , $c$ , and $d$ are 4 positive integers.

How many odd numbers are possible at most?

Check the series : Odd And Even Numbers - 1 and 3

4 2 3 1

1 solution

Ram Mohith
Mar 15, 2018

It is given that ab + cd is an odd number . The sum of an even number and odd number will give odd number .

So cd is an even number .

$ab = odd \times odd$

$cd = odd \times even$

Therefore the maximum number of odd numbers possible is $\boxed{3}$ .