CHALLENGE 21-23 QUESTIONS AND ANSWERS:
CHALLENGE 21:
After paying all your holiday bills, you're very short of cash.
You have a total of $9.60 in your pocket. The money is composed of equal numbers of quarters, dimes, and nickels, but no other coins. How many of each of those three coins do you have?
CHALLENGE 21 ANSWER:
24 coins of each kind
CHALLENGE 22:
If six puzzle makers can compose nine puzzles in a day and a half, how many puzzle makers does it take to compose 270 puzzles in thirty days?
CHALLENGE 22 ANSWER:
9 puzzle makers. Each puzzle maker can compose one puzzle a day.
CHALLENGE 23:
complete the sequence:
fly, spider, bird, cat, dog, ______
CHALLENGE 23 ANSWER:
horse (this is the next thing the "old lady" swallowed in the childrens song)