# Grow Those Antlers!

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.

# Grow Those Antlers!

December 24, 2014

At this time of year we see a lot of pictures of reindeer, often pulling a sled carrying a big fat guy wearing a red suit. Very often those deer have antlers. Do both boy deer and girl deer get them?When do they grow them, and when and why do antlers fall off? It turns out that antlers are the fastest-growing bone of any mammal, growing up to 1 inch per day. On a moose that adds up to a whole pound a day, growing to as much as 80 pounds! Deer antlers weigh only about 3-9 pounds, and usually only boy deer (bucks) grow them. Antlers are fuzzy, covered with a velvety skin that carries blood to help the antlers grow. They sprout the fastest in the spring, when the deer’s brain senses that there’s more daylight and signals to its body to start growing them. The rack reaches full size around August, and the velvet peels off. Deer shed their antlers any time from late December to early March; then spring comes, the sun stays out longer, and the deer start growing a whole new fuzzy set.

Wee ones: Deer, elk, moose and caribou all grow antlers. How many different animals is that?

Little kids: If a deer, elk, moose and caribou each have 2 antlers, how many do they have all together?  Bonus: Usually the older a buck, the more points each antler will grow that year. If a young buck has 4 points on each antler and his brother has 7 points on each, how many more in total does his brother have?

Big kids: If 5 deer have 40 points in total on their antlers, how many points does each antler have if all deer and antlers are the same?  Bonus: If among 18 deer only some are boys (which have antlers), and there are 6 more antlers than deer, how many boy and girl deer are there?