Say whether a number is odd or even, or write the next odd or even number after it. Works on numbers as long as you like, because the rule never changes.
Grade 1–Grade 3 · every refresh draws a new set · answer key included
Odd and even worksheets
Write odd or even next to each number.
Odd and even worksheets — answer key
Write odd or even next to each number.
24 problems · US Letter · answer key — 2 sheets, page breaks marked in the preview
Odd and even is a one-rule topic, and that is precisely why it is worth a page: the rule works on any number, however long, because only the last digit matters. A pupil who checks 4,317 by trying to halve it has not learned the rule, and a page of two-digit numbers will never reveal that. Raise the digits and the sheet stops being about parity and starts being about whether the pupil trusts the rule.
Grade 1 to Grade 3, ages six to nine. Single and two digit numbers are first-year work; four and five digit numbers are a five-minute Grade 3 check that the rule is understood rather than memorised as a list of small even numbers.
Start with odd or even on two-digit numbers, then jump straight to four or five digits — the intermediate step teaches nothing. Next even and next odd are the harder variants, because a pupil has to notice whether they are already on the right kind of number: the next even number after 12 is 14, but after 13 it is 14 as well, and that pair of cases is the whole exercise.
The most telling wrong answer is treating a long number by its first digit rather than its last, which means the pupil is pattern-matching on shape rather than applying the rule. On the next even and next odd questions the usual fault is always adding two, which gives the right answer half the time and quietly hides the misunderstanding.