Mouse + Kangaroo = ?…

by Laura Overdeck

What kind of animal is this? It’s a jerboa, a tiny hopping mouse that lives in the desert. Even though it’s only 3 inches long, it can hop at 15 miles per hour! Its ears are longer than its whole head, and its tail can be longer than its whole body. The math gets even crazier when it comes to housing: the jerboa lives in 4 different burrows. It has 1 burrow for hiding during the day while hunting; 1 for hiding at night while hunting; 1 “full-time” burrow for summer; and 1 full-time winter home. We hope the jerboa can remember directions as well as it can hop.

Wee ones: If you had 1 little house for the spring, 1 house for summer, 1 house for fall and 1 more for winter, how many houses would you have in total?

Little kids: How many ears do you and that jerboa have together?  Bonus: The jerboa has 4 legs, including 2 tiny front ones. If there are 10 legs in the room, how many jerboas could there be, and how many people if there’s at least 1 of each?

Big kids: How many times as tall as a 3-inch jerboa is a 60-inch-tall human?  Bonus: If a 3-inch jerboa can hop 15 miles an hour, how fast could that 60-inch human hop if people were just as fast compared to their height?

Answers:
Wee ones: 4 houses.

Little kids: 4 ears.  Bonus: There could be 1 jerboa and 3 people, or 2 jerboas and just 1 person.

Big kids: 20 times as tall.  Bonus: 300 miles an hour!

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