A waterslide is an exciting summer ride: fast turns, jets of water shooting at you, giant splash at the bottom. Now imagine if the whole waterslide were alive! Scientists actually caught photos of a dolphin taking waterslide rides down the back of a whale. The whale probably didn’t mind: humpback whales weigh almost 80,000 pounds, while a bottlenose dolphin weighs less than 1/100th of that. It all worked out, giving that playful dolphin one more reason to smile.
Lace up: One dolphin took 6 rides in a row. Flap your arms like flippers, and hop 6 times!
Jog: If the dolphin slides down the right side of the whale, then the left side, then the right side again to repeat…after 5 turns, how many times does it slide to the right?
Sprint: If it takes the dolphin 10 seconds to get on top of the whale and then 4 seconds to slide down, how long does each ride take?
Hurdle: If the 12-foot dolphin is a whole 39 feet shorter than the whale, how long is the whale?
High Jump: If a 79,000-pound whale weighs exactly 100 times the dolphin, how much does the dolphin weigh? (Hint if needed: To start, what if it weighed 10 times as much?)
Pole Vault: Back to that sliding game…if the dolphin slides down the right side, then the left side, then the left again, then repeats, which side will it pick for the 123rd turn?
Answers:
Lace up: Count your hops: 1, 2, 3, 4, 5, 6.
Jog: 3 times to the right (turns 1, 3 and 5).
Sprint: 14 seconds.
Hurdle: 51 feet.
High Jump: 790 pounds, a bit more than your usual dolphin.
Pole Vault: The left side. 123 is a multiple of 3, and all multiples of 3 will be the same. You can tell whether any number is divisible by 3 by adding up its digits: if they add up to a multiple of 3, then so is the number. In this case, the digits add up to 1+2+3=6!
