Count the Monkeys
This problem is a version of the vanishing puzzle made famous by Sam Lloyd's 1898 Get Off the Earth puzzle. Students should count 15 monkeys in position A, and 14 monkeys in position B. There is no disappearing monkey because the two circles contain, not monkeys, but bits and pieces of monkeys. Turning the inner circle rearranges those bits and pieces to form different numbers of monkeys. See if students can find the pieces that "move" from one monkey to another when the inner circle is turned.
What Color is Your Balloon? Balloons should be colored as follows: 3 red, 2 yellow, 4 blue, 6 green, 5 white.
What's Your Angle?
Together, the five shapes contain 8 right angles, 6 acute angles, and 5 obtuse angles. Encourage students to check
their answers by measuring each of the angles. The five shapes can be combined as shown below to form a single
square.
The Tall and Short of It Nametags should read left to right in the following order: blank, BethAnn (3'9"), Alex (3'10"), Ruth (3'11"),
blank, Marisol (4'0"), Raymond (4'1"), Amy (4'2"), Pablo (4'3"),Suri (4'4"), Charles (4'5"), Sarah (4'8"), Brad
(4'10").
The Hot Dog Stand
There are a number of possible solutions to this puzzle, including the ones below. Individual students' solutions
will vary. Some of the prices Harry might charge during the summer are:
HARRY'S PLACE
Hot Dogs
Drinks
Snacks
$1.60
$1.38
$1.12
HARRY'S PLACE
Hot Dogs
Drinks
Snacks
$1.68
$1.31
$1.20
HARRY'S PLACE
Hot Dogs
Drinks
Snacks
$1.83
$1.61
$1.30
Some of the prices Harry might charge during the winter are:
