# Cloudtrackers

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.

# Cloudtrackers

October 30, 2014

Wee ones: If your hand is 4 inches tall and you make a bunny-rabbit shadow that’s 1 inch taller, how tall is the bunny shadow?

Little kids: Which is higher in the sky, a horse-tail cirrus cloud at 21,000 feet or a raincloud at 12,000 feet?  Bonus: If that chunk of raincloud is half as wide as it is high in the air, how wide is it (and its shadow)?

Big kids: If your street block has 15 houses on each side of the street and the bottom 1/3 of the block is in shadow, how many houses are still in the sun?  Bonus: If it takes 10 minutes for a cloud to pass across the Sun and that cloud is blowing across at 12 miles an hour, how wide is that cloud? (Hint if needed: An hour has 60 minutes…so what fraction of an hour is 10 minutes?)

The sky’s the limit: If you’re riding a bike down a long, straight road, and the edge of the cloud shadow is 100 feet up ahead and moving 20 feet per second and you’re riding at 40 feet per second, how soon will you reach the edge and ride into the sunshine?