Sort numbers into even and odd — pair up counters to 20, then read the ones digit for numbers to 100 and 1,000. Each set prints with a matching answer key. Always free, no signup.
Open the even & odd builder →Start with numbers to 20, where each number is small enough to draw as counters and pair up — even numbers pair perfectly, odd numbers leave one over. Next move to two-digit numbers to 100, switching to the shortcut of reading only the ones digit. Then practise three-digit numbers to 1,000 to prove the last-digit rule never changes with size. Each worksheet above sets exactly one of those stages.
An even number splits into two equal groups with nothing left over and ends in 0, 2, 4, 6 or 8. An odd number always leaves one left over and ends in 1, 3, 5, 7 or 9. Every whole number is exactly one or the other, and they alternate as you count: even, odd, even, odd.
Look only at the last digit — the ones place. If it is 0, 2, 4, 6 or 8 the whole number is even; if it is 1, 3, 5, 7 or 9 it is odd. The hundreds and tens make no difference at all, so 1,238 is even and 4,975 is odd.
Yes — every set is free to generate and print, with answer keys, no account and no watermark. Each click makes a fresh set of numbers to sort into even and odd.