If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content
Current time:0:00Total duration:1:44

Video transcript

how many dogs do you see and I have the dogs down here we you see to count them so if I'm starting with this dog and I want to make sure that I don't count him again someone remember I'm starting with this top dog one two three four five six seven eight I see eight dogs you might be tempted to go nine but I already counted this dog so there's only eight dogs so I see eight dogs so let's check our answer got it right how many mice do you see same thing I like to start with the top Mouse but we have to remember if I'm going to start counting with the top Mouse I don't want to keep counting the top Mouse so one two three four five six seven now you might be tempted to go eight but we already counted this top Mouse so there's only seven mice here seven mice you got to be careful not to keep going in circles and counting the mouse over and over and over again you only want to count each of the mice once let's do another one this is too much fun how many cookies do you see alright they're all jumbled up here and we just have to be careful not to count the cookie twice so let's see one two three four five six seven eight nine there are nine cookies I see nine cookies how many mice are there okay now here there are a lot of mice so there's one two three four five six seven eight nine 10 11 12 13 14 15 16 17 18 19 mice there are 19 mice there that's that's a lot a lot of mice