1. Find Even or odd number of `21,12`
Solution:
Even number is number that can be divided evenly by 2. Even number always ends with 0, 2, 4, 6, or 8.
Odd number is number that cannot be divided evenly by 2. Odd number always ends with 1, 3, 5, 7, or 9.
To check whether a number is even or odd, look at the ones place (last digit) of the number. That last digit will tell you whether the whole number is even or odd.
Last digit of 21 is 1, So 21 is odd number
Last digit of 12 is 2, So 12 is even number
The even numbers are `12`
The odd numbers are `21`
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