# Kissing a Hippo

Here's your nightly math! Just 5 quick minutes of number fun for kids and parents at home. Read a cool fun fact, followed by math riddles at different levels so everyone can jump in. Your kids will love you for it.

# Kissing a Hippo

October 23, 2018

We love “Picture of the Day” on the website Wikimedia, because they always find the wackiest photos — like this one. Photographer William Warby snapped these 2 kissing hippos at the Whipsnade Zoo in England. Actually, it’s hard to tell whether they’re playing, kissing, or just shoving each other out of the way. Hippo is short for “hippopotamus,” which means “river horse.” These round, gray lumps are the 3rd largest land mammal, after the elephant and the white rhinoceros. The funny thing is, their closest cousins are another set of chubby mammals: whales and dolphins! Well, hippos love water just like they do, and it looks like they love to play, too.

Wee ones: Hippos have 4 short, stumpy legs. What numbers would you say to count them?

Little kids: Hippos need to breathe every 3 minutes. If a hippo swims for 3 minutes, comes up for 1 minute, then goes under for 3, how many minutes does that take?  Bonus: If it keeps up that pattern, is the hippo swimming or breathing at 10 minutes?

Big kids: If you ride on your 3,300-pound pet hippo, how much do you weigh together? Find out your weight in pounds!  Bonus: If a rhino weighs 4,000 pounds, a horse weighs 1,000 pounds, and a hippo’s weight is halfway between, how much does the hippo weigh?

The sky’s the limit: A hippo can live for 45 years. If a hippo’s grandkids are all ages that divide neatly into 45, with 1 hippo of each age, at least how many grandkids must it have?