# Problem of the Week 05-01-2017

May 1, 2017 | Coral Springs

Lower Elementary:

Question:  Each of 10 cats has 10 kittens. Each of the kittens has 10 whiskers. How many kitten whiskers are there?

Solution:   If each of the 10 cats has 10 kittens, then there are 10 × 10 = 100 kittens. If each kitten has 10 whiskers, then there are 100 × 10 = 1,000 whiskers.

Upper Elementary:

Question:  Jessica has three cats. One is black, one is gray, and one is white. The white cat is not the oldest. The gray cat is older than the black cat. The black cat is younger than the white cat. Put Jessica’s cats in order from youngest to oldest.

Solution:   Since the white cat is not the oldest, it can only be the youngest or middle cat. That means that for the gray cat to be older than the black cat, the gray cat has to be the oldest because the black cat and the white cat must be the two younger cats. Since the black cat is younger than the white cat, we can conclude that the order is black, white, then gray.

Middle School:

Question:  The cost per day of Kitty Kare cat sitters is \$20 plus \$8 per cat. Furbaby Sitters charge \$25 and \$4 per cat. Scott is going out of town for two days and needs a sitter for his three cats. How much money does Scott save by choosing Furbaby Sitters instead of Kitty Kare?