Letter or Number?
Circle every number.
For the grown-up: the answers appear on a second page under the sheet. They are not printed unless you choose Print with answer key under More.
Six letters and numbers in every box: circle all the letters, or all the numbers. This one is “Letter or number · Numbers · Both cases” with 4 boxes, and the answer key prints on its own page. Print it free in color or black and white, on US Letter or A4, or press Make your own to change it.