Multiple choice general knowledge science & technology How many teeth do kids have—at least until they start falling out? 20 30 18 10 Reveal answer Fill a bubble to check yourself A Correct answer Explanation Children have 20 primary teeth that erupt during early childhood and begin falling out around age 6-7, replaced by permanent teeth. The other options are incorrect: 30 is close to adult tooth count, while 18 and 10 are too few.