# Your Own Backyard Waterslide

What if you had a water slide in your backyard? Grandpa Paul Betts saw an amusement park throwing out an old water slide, so bought all the giant tube pieces for just 50 pounds, then brought them to his grandkids’ house. With 18 sections each almost 10 feet long, the slide stretches 130 feet across the land, even with all the twists and turns!

Wee ones: Are there more red or yellow slides in the picture?

Little kids: If the grandpa, the mom, the dad, and the 2 kids all ride the waterslide, how many people get to ride it? Bonus: If they start off connecting just 3 10-foot pieces, how long a slide do they make? Count up by 10s!

Big kids: If the grandpa, mom, and her son Oscar line up to take turns, how many different ways can they line up? Bonus: If a normal slide is 6 feet long, and this one has 18 10-foot sections, how many times as long as a normal slide is this crazy slide?

Wee ones: We count 2 yellow slides and 1 red slide, so more yellow slides!

Little kids: 5 people. Bonus: 30 feet: 10, 20, 30.

Big kids: 6 ways: GMO, GOM, MGO, MOG, OGM, OMG! (There are 3 choices for the 1st rider, then for each of those there are 2 choices for the 2nd, and the 3rd is set, giving us 3x2x1). Bonus: 30 times as long! 18 1-foot sections would be 3 times as long in total, so making them 10 feet multiplies that by 10.

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