The get a list of all even numbers, write the number 2, then slip the next number (3) and write the number 4. Continue by skipping every other number, which will be the odd numbers.
Alternatively, write a consecutive list of all of the numbers from 1 to 50, then multiply each one by 2. The products are all of the multiples of 2, which are even numbers.
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The only even prime number (not only from 1 to 100, but in general) is 2. All other even numbers are multiples of 2, and therefore, by definition, not prime numbers.
Code Below: <?php $j = 100; // Set limit upper limit echo "Even Numbers are: <br/>"; for($i=1;$i<=$j;$i++) { if($i%2) { continue; } else { echo $i."<br/>"; } } ?>
Since odd numbers are in a ratio of 1:2 it means for every one odd there will be one even, there would be 50 odd numbers between 1-100, and 50 even numbers. So 50%.
30, 60, 90
There are 49 even numbers less than 100, but only the number 2 is an even prime number less than 100.