ARCHIVES.
FALL 2006:
PUZZLE #1 An oldie but a goodie!
Responses/hints: Congratulations to all!
PUZZLE #2 Tiling the bathroom
floor
Responses/hints: Maybe this one was too easy?
Responses/hints: Many Moe like this?
PUZZLE #4 How many squares do you see?
Responses/hints: Too many squares?
PUZZLE #5 Where have you seen
these?
Responses/hints: Round and round?
PUZZLE
#6 More milk or coffee?
Responses/hints: ratios, ratios, ratios!
PUZZLE
#7 Tiling the kitchen floor
Responses/hints: What angles??
Responses/hints: Check your number!
PUZZLE #10 Fractions can be fun!
Responses/hints: How many ways?
PUZZLE #11 Tennis balls anyone?
Responses/hints: And the ratio of balls to air is ??
PUZZLE #12 And the sum of the numbers is?
PUZZLE #14 A sneaky way to compute squares
SPRING 2007:
PUZZLE #15 Guess my favorite number
Responses/hints: Make a list & check it twice
PUZZLE #16 Fractions
can be fun,
Part2!
Responses/hints:
See Puzzle 10
Responses/hints: Try something!
Responses/hints: Try
it out!?!?
Responses/hints:
So many solutions?
PUZZLE
#20 NO, NO! Not that one!!
Responses/hints:
double trouble
Responses/hints: compute each time . . .
Responses/hints: Check 1 chicken out.
PUZZLE
#27 How many triangles do you see?
PUZZLE
#28 Pythagorean triangles
PUZZLE #29 Salaries
PUZZLE #30 Surveys
Responses/hints: 100 – 25 = 75?
PUZZLE #31 Fence
them in
Responses/hints: continuing the hint . . .
FALL 2007:
PUZZLE #32 Goats are good.
Responses/hints: draw a picture
PUZZLE #33 Surface and volume
Responses/hints: Calculate & compare
PUZZLE #34 Fill in the blanks
Responses/hints: Try, try again
PUZZLE #35 Which coins are where?
Responses/hints:
try it!
PUZZLE #36 Out of thin air?
Responses/hints:
check everything very carefully
PUZZLE #37 What is wrong with this
argument?
Responses/hints:
check every statement carefully
PUZZLE #38 What is the angle?
Responses/hints: recall the definition & properties of isosceles
triangles?
PUZZLE #39 What is the area?
Responses/hints: Break up the figure into smaller pieces
PUZZLE #40 How long is the string ?
Responses/hints: Try to construct the figure
PUZZLE #41 SUDOKU X PLUS
Responses/hints:
Try it, have fun!
PUZZLE #42 Find the number
Responses/hints:
Make a list & cross off the losers.
PUZZLE #43 A 12oz. cup of water, please.
Responses/hints:
No marking of the cups is possible.
PUZZLE #44 Colored hats.
Responses/hints:
Suppose you have a black hat?
PUZZLE #45 Some numbers are perfect.
Responses/hints:
Get out your calculators.
PUZZLE #46 How many kids?
Responses/hints:
Try out some numbers.
SPRING 2008:
Responses/hints: Finish what you can.
PUZZLE #48: Find the number mystery
PUZZLE #49: Find the number, a
mini-mystery
Puzzle #50: Making
a round based solid
Puzzle #51: Measure for measure
Puzzle #52: Counting coins
Puzzle #53: Counting more coins
Responses/hints:
See #52 hints
Puzzle #54: Right, as in triangle
Responses/hints:
try it!
Puzzle #55: Overlap areas
Responses/hints:
try it!
Puzzle #56: Count the cubes
Responses/hints:
Make a list
Puzzle #57: Tangent lines
Responses/hints: see the hint stated in the puzzle
Puzzle #58: More counting coins
Responses/hints: see Puzzle #52 and Puzzle #53
Puzzle #59: An oldie but a goodie, Part
II
Responses/hints:
see Puzzle #1
PUZZLE #60 All
acute triangles are isosceles(revised)?
Responses/hints:
check that picture!
PUZZLE #61 How to trisect an angle, Archimedes style(revised)
Responses/hints: see hint in puzzle. (Argument is here.)
FALL 2008:
PUZZLE #62 Fast
multiplication, and Empty Sudoku
Responses/hints:
here
PUZZLE #63 The
8-cube Puzzle
Responses/hints:
Send me pictures of your creations!
PUZZLE #64 More
Escher
PUZZLE #65
Numbers, numbers, numbers
Hints:
try this
PUZZLE #66: Averages
Hints/Responses:
Here
PUZZLE #67: SOMA
CUBE
Hints/Responses:
Here
PUZZLE #68: Diagonals
and Triangles
Hints/Responses: Counting
PUZZLE #69: Doodles
Hints:
Just do it.
PUZZLE #70: More
Doodles
Hints:
Try this
Puzzle #71: Right
triangles?
Hints/Responses:
Check the angles
Puzzle #72: Poinsot
Stars
Hints/Responses:
See the patterns?
SPRING 2009:
Puzzle #73 Circles
inside triangles
Hints/Responses:
Try this
Puzzle #74 Squares
in triangles
Hints/Responses:
Check this out (NEW)
Puzzle #75 Pythagoras
again?
Hints/Responses:
Try this
Puzzle #76 Broken
Calculator
Hints/Responses:
Try these ideas
Puzzle #77 How
many students? (updated)
Hints/Responses:
Many ways to solve this one(NEW)
Puzzle #78 Label
these bags correctly
Hints/Responses:
Try each possibility
Puzzle #79 How
many possible sums?
Hints/Responses:
lots of compositions
Puzzle #80 How
many triangles?
Hints/Responses:
Count by sizes NEW!
Puzzle #81 Minimax
Principle
Hints/Responses:
min-max?
Hints/Responses:
Try this
FALL 2009: