Six-year-olds often decide that 100 must be odd because it looks big and strange, while 8 feels even because it is round. Size, however, has nothing to do with it. This 1st grade even or odd sets worksheet gives your child eight boxes, each with five numbers in a row, such as 12, 22, 10, 8 and 2. All five numbers in a box belong to the same family. Under each set, your child colors the word Even or the word Odd. The numbers climb to 120, so the page rewards a rule rather than a guess. A second page gives the answer key.