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:
Puzzle #83: Number Play
Hints
& Responses: Check this
Puzzle #84: If you are left standing, you
win!
Hints
& Responses: Try this
Puzzle #85: Building numbers
Hints
& Responses: Make a list
Puzzle #86 Squares inside squares
Hints
& Responses: It must be 45-45-90?
Puzzle #87 Indiana Smith and the Museum
Mirrors Mystery
Hints
& Responses: use the Principle of
Reflection
Puzzle #88 Where to build the bridge?
Hints
& Responses: Try these ideas
Puzzle #89 Triangles in triangles
–Revised and Bonus added!
Hints
& Responses: Parallel lines
Puzzle #90 Polygonal numbers
Hints
& Responses: See the patterns?
Puzzle #91 A Few Quickies
Hints
& Responses: Try these ideas
Puzzle #92 How many regions?
Hints
& Responses: Count carefully
Puzzle #93 Name those angles
Hints
& Responses: Make a picture
Hints
& Responses: Check this out
SPRING 2010:
Puzzle #95 Areas of Triangles
Hints
& Responses: Walk thru this
Puzzle #96 Magic Squares?
Hints
& Responses: Check this
Puzzle #97 The Hunt
Hints
& Responses: Make a list
Puzzle #98 What is the basic shape?
Hints
& Responses: Here is a listing
Puzzle #99 How far is it?
Hints
& Responses: Make a picture
Puzzle #100 Triangles or not? –Revised
Hints
& Responses: Check these figures
Puzzle #101 Shapes and sums
Hints
& Responses: Did you get this one?
Puzzle #102 Numbers and business
Hints
& Responses: Make a list . . .
Puzzle #103 More Numbers and a Ditty
Hints
& Responses: Did you try this?
Puzzle #104 Sets, sets, and more sets.
Hints
& Responses: make a set
Puzzle #105 More sets
Hints
& Responses: see #104A
Puzzle #106 The Mystery Numbers
Hints
& Responses: Check this
Puzzle #107 More about nines
Hints
& Responses: It is in the arithmetic
(revised)