dansmath > problem of the week > archives
 
Have fun looking through all my old problems!
 
Dan's Problem Archives Index
 
Probs & answers . 1-10 . 11-20 . 21-30 . 31-40 . 41-50 . 51-60 . 61-70 . 71-80 . 81-90 . 91-100 . 101-110
Problems only . . . 1-10 . 11-20 . 21-30 . 31-40 . 41-50 . 51-60 . 61-70 . 71-80 . 81-90 . 91-100 . 101-110
Problems & answers . 111-120 . 121-130 . 131-140 . 141-150 . 151-160 . 161-170 . 171-180 . 181-190
Problems only . . . . . . . 111-120 . 121-130 . 131-140 . 141-150 . 151-160 . 161-170 . 171-180 . 181-190
Probs & ans . 191-200 . 201-210 . 211-220 . 221-230 . 231-240 . 241-250 . 251-260 . 261-270 . 271+
Problems only . 191-200 . 201-210 . 211-220 . 221-230 . 231-240 . 241-250 . 251-260 . 261-270 . 271+
 
or click on a title below to go to that problem in the
+ Complete Problem List +
Warning: These contain ANSWERS. For problems only, read
the title below and click on the 'Problems Only' number range above.
 
1- The Most Divisors
2 - Trains versus fly!
3 - Unit fractions 1/n
4 - The Census Taker
5 - Square root probs
6- Buying house nos.
7 - Name that pattern
8 - Clink wine glasses
9 - Strange Powers !!
10- Odd & Abundant?
 
11 -Impossible Twins?
12 -The ABC's of Cars
13 - Spider and the Fly
14:Intersecting Bubbles
15 -The Right Numbers
16 -The Magic Number
17 - How Many Ants ?
18-What Time Was It?
19 - World Cup Soccer
20:The Average Speed?
 
 21:Men and/or Women
22 -How Much Space?
23-Fermat's First Thm
24:That's Sum Product
25 - To Seven-Eleven?
26-The Two Elephants
27 - How Many Tiles?
28 - Where On Earth?
29 - Fridays the 13 th
30 -Turk-o-nacci Nos.
 
31 - Paint My House!
32 - Squares in a Box
33 - Disk- o -Mania !
34 Party like it's 1999
35 - Fifth Half Asleep
36- Under Salary Cap
37 - Bad Cancelling !
38 - Same Birthday ?
39 - - Holy Triangle !
40 -- More on Twins

 

41- Car AND Train!
42 - Co-Perfect Nos.
43 -"Divisorly" Nos.
44 - The Lying Truth
45 - Not Sold at 7-11
46: Round the Corner
47 - Roll That Prime!
48 - Cut The Cheese!
49 - Not So Peachy!
50 - Bouncing Ball...

 

51- The Age-Old Lie
52- - Determine - It !
53 - Chickens'n'Eggs
54-The Three Boards
55 - The Millionaire!
56- Subtrac.Diamond
57 - Close to the Line
58 - - Y 2 Digits - - ?
59 - - Bicycle Shorts!
60 Odd Combinat'ns

 

61 - The Right Sticks
62 - Eat Lots of Fruit
63 - Sqrs into Primes
64 A Prime Complex
65 - - Goat or Sheep ?
66 - Holiday Cookies
67 - Into 2 Thousand!
68 -- Powerful Digits
69 -- The Do-It-Alls!
70 - "Can" Be Done!

 

71- Reciprocal Sums
72- Valentines 4 All!
73 - Divisible Dates?
74 - Four Centuries !
75 - Work/Study Pts.
76 - The Triple Kiss!
77- Polynomial Road
78-RunForYourLife!
79- Open+Shut Case
80-Try Our Products

 

81 Change 4A Dollar
82 - - Solve Or Die !
83:The Tree Amigos
84 Crazy Ma'ticians?
85 - - Total-ly Equal!
86- Number of Clues
87: 2 Balls and a Box
88- A Growing Road
89-Gear's The Thing
90 - Cross Numbers

 

91- A Sinking Storm
92 - Tiling Me Softly
93- One for the Ages
94 - Hole In The Ball
95 - Above Avg. Art
96 - Missing Dollar ?
 97-Three Funny Nos.
98 - The Dinner Date
99 - Birds on the Run
100 - Parents To Bee?

 

101 -- The Fab Five !
102 - Similar but Diff
103 - Weird Numbers
104 Dan's Prime Code
105- Ez Come, Ez Go
106- New Year Phone
107- Geometry Gems
108 - Cover The Cube
109- Based On What?
110 - Family Of Four

 

111 -- Wedding Cake
112 - Hands On Time
113 - The Two Cubes
114 - Price of Stamps
115 - Thinking Caps!
116 -- Hoop It Up ! !
117 - Kissing Circles
118 -Cubes & Squares
119 Better than Perfect
120 -- Rotating Tires!

 

121 -- Gear Numbers
122 Power 2b Diffrnt
123 -- Tour de Ants !
124 Lattice Midpoint
125- Goats for Sheep
126 -- Longest Train!
127- Hex Floor Tiles
128 - Two or 3 Kids?
129 Grand Exponents
130 - Triang-U-Later!

 

131 - Back at the 7-11
132 - - The Top Five !
133 -- Walk, Eat, Bike
134 A Peachy Quintet
135 - Reciprocal Pairs
136 How Lo CanUGo
137 -- 2000 Shuffles !
138 The Twelve Coins
139 - A Funny Inverse
140 Swimr Loses Cap

 

141 Where's the Road
142 - - Strike A Chord
143- Easy as A-B-C-D
144 - - - Click to 222 !
145 - Up The Volume!
146 - Maxes & Means
147 - Circle the Roots!
148 - - Weird Bases !!
149 - Indep'd'ce Events
150 Hpy Bday Hermen
 
151 Friends, Wives, $
152 Nearly Isosceles?
153- Sharon & Karen
154 - Swim 2D Boat !
155 - Can You Digit ?
156 - This Old House
157- Chop,Skip,Chop
158- Digits in the Bag
159 Money in theHole
160 - Cubes Come 4th
 
161- Dimples All Over
162 Your Fav Subject?
163 - Riding The Train
164 - Three More Sqrs
165 -- Here's To 2003!
166 -- Happy And Sad
167 ExerciseEfficiently
168 Arranged by Hight
169 - Pay For Grades?
170 - Area's The Same
 
171 - Drowning Child!
172 - To Catch A Thief
173- Three Equal Areas
174 Pigs Pkeets Profits
175 Fruit Season Again
176 - Jack - and - Diane
177 - Cover That Table!
178 - - The Cat-Census
179 Around The World
180 Cover That Board?
 
181- A Triangular Duel
182 - Two More Trains
183 WhichKindaCandy
184 Crank Out Power(s)
185- Money-Go-Round
186- Sums of 2 Squares
187- Right Triang Spiral
188 - Chess Tournament
189- - -The Three Trees
190 -- The Flower Farm
 
191 -- The Disk Cutters
192 --- Slice Into Dice !
193 - Even That's Odd !
194 Uncomm'nMultiple
195 - Over-Committeed
196- The Pentominator!
197 CommonRemainder
198 - Odd and Different
199 - Twice The Angle !
200- Run with the Dogs
 
201 CouplesBuyBooks
202- Magic Sqr Primes
203 Where's th' Crowd?
204 Where's th' Squares
205 ^Orange Pyramids^
206 - Given GCD, LCM
207 The Lost Bill of Sale
208- The Third Degrees
209whenCosinesCollide
210- The Odd Olympics
 
211 Cogito Log-o-Sum
212 - C h e c k , P l e a s e
213 - Island Hopping...
214 -- The Four Means
215 - Put A Hex On It !
216 - Band in Boston ?
217- Baskets of Apples
218 Holy Sphere +circle
219 -- See Double Free
220 - - Cube in a Cone!
 
221 Square, Not Square
222 SpareSumSquares?
223 Divisor Take-Away
224- Fractionacci Nums
225 3 Sums of 2 Nums
226 Conhexutive Nums
227 - - Photo Mosaics!
228 - Cross Numbers...
229 Partitions of Unity.
230- The Closest Dots?
 
231 Obsessed wSquares
232 - oNly oNe loNe N
233 Lucas Square Sums
234 Saturated Numbers
235- From 0 To Infinity
236 - Gimme an Integer
237 - - Nearly Integers!
238 - - Cube It Together
239 -- The 3-4-5 Square
240 - - The Pies Have It
 
241- Local (loco)motion
242 Put a hex around you
243 AltitudeswithAttitude
244- Half More Number
245- Sphere of Influence
246 -- Beating the Cycle!
247-- I Am the Bugman!
248 HowManyRunners?
249- Eat a Peach (a mile)
250 - - Pack 'Em All In !
 
251 - Nice / Dice / Twice
252 - - Nearly Multiples!
253 -- Powers Five Apart
254 Vote Four Pumpkins
255 - The Round Robins
256 - Get A Clue (or three)
257 -- nEver Say Never ?
258 -- The Math Contest
259- Ah, Now We Know
260 - White,Black,What?
 
261 - - Here's To Toast !
262 -- Five Running Ten
263 - Cosine My Loan ?
264 Cubes&Sqrs 2gether
265 - Four Mini-Pollies!
266- Those Factorialoots
267- Squareful Numbers
268 Nine Tangled Wires
269 AnotherBrick inWall
270-SpheresFillingSpace
 
271- Dan's Directriconix
272- StockProfits2dMax
273- Best Best-Fit Curve
 
274 FactoriusConsecutos
275 -- Escape the Zombie
276 - - Corner of a Circle
 
277- Group the Numbers
278 Some Smallest Sums
 279- Triangles & Squares
 
Browse the complete problem list, check out the weekly leader board,
or go back and work on this week's problem!
 
Deadline for Problem #280 is Tuesday, Nov. 11, 2008 !
 
: listen to dansmathcast : my math podcast! :
 
(back to top)
 
[ home | info | meet dan | ask dan | matica | lessons | dvc ]

 
This site maintained by B & L Web Design, a division of B & L Math Enterprises