July 26, 2020

The Bumpy Bike Path

8. The Bumpy Bike Path

Puzzler: Why are Treks 6 and 7 missing?
Answer: Fibonacci numbers only, please.

"If you think our baseball field is weird, come and see our roads and tracks," says the tall, thin alien who has been playing first base (see "The Alien Baseball Field").

The team of nine Digits leads you, Anita, and Bill down a very bumpy road.


"How do you digits manage to walk here?" you ask, trying to keep your balance.

"We don't often walk," says Digit One, the tall, thin alien, with a wide grin. "We ride our bikes."

"Yeah, sure," says Anita."Who could ride a bike on these bumps?" 

"Take a look at our bikes," says Digit One, pointing to a nearby hut with a sign.


Digit Four opens the door, revealing several odd-looking bikes. "Why don't you try them out," the alien tells you and your two companions. "You might be surprised how smooth the ride can be if your bike suits the road."

The first bike you see looks ordinary, but the one beside it has wheels that look like flattened circles, or ellipses. A third bike has square wheels. There's even a bike with star-shaped wheels.


Four types of bike wheels: round (top left), elliptical (top right), square (bottom left), and star-shaped (bottom right).

Which of these four bikes will give you the smoothest ride on the bumpy road?

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