Mathproblems.info
Formerly known as Shack's Math Problems
by Michael Shackleford, A.S.A.

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241.10 playing cards and a dark room
113.10,000 digits of e problem
190.100 coin problem
26.100 single women problem
127.100 story building and a billiard ball problem
84.12 pearls and a scale problem
80.128 pennies and a blindfold problem
118.13 pirates and a safe problem
204.154 Rolls of the Dice in Craps
132.21 squares in a big square problem
219.23 prisoners and two light switches problem
221.25 horses problem
239.3 hot dog vendors and a beach
240.4 hot dog vendors and a beach
165.64-minute fuse problem
97.A dog, a chain, and a lighthouse problem
32.A fence, board, and a shadow problem
72.A jar and an amoeba problem
150.ABCDE * 4 = EDCBA problem
179.Acceleration problem
27.Alley and two ladders problem
152.Ant and spider on a piece of wood problem
4.Ant and spider problem
206.Ant on a rubber band problem
195.Average of the least of n random numbers from 0 to 1?
194.Average of the lesser of two random numbers from 0 to 1?
56.Babies in the nursery problem
24.Baby bottle problem
19.Balls and an urn problem #1
200.Baseball playoffs question
154.Biased coin flipping problem #1
155.Biased coin flipping problem #2
202.Blue and Red Amoeba
149.Burried treasure problem
110.Cable in the field problem
99.Camel and grain problem
64.Cardiod problem
57.Chessboard problem #1
58.Chessboard problem #2
9.Chicken McNugget problem
189.Circle and triangle problem
125.Clock problem
66.Closest distance between two points on a sphere problem
184.Coconuts and monkey problem #2
11.Coin toss problem #1
44.Coin toss problem #1
46.Coin toss problem #3
61.Coin toss problem #3
128.Coin toss problem #4
37.Common birthday problem
31.Compound interest problem #1
49.Compound interest problem #2
86.Compound interest problem #3
244.Connecting four points on a square
224.Cooling beer problem
168.Cows eating grass problem
107.Create 24 with 1, 3, 4, and 6 problem
103.Create 24 with two 3s and two 7s
130.Cutting a pizza problem
3.Cycloid problem
223.Cylinder in a sphere problem #1
228.Cylinder in a sphere problem #2
17.Dartboard problem #1
102.Dartboard problem #2
174.Dating service problem
141.Dice game #1
142.Dice game #2
143.Dice game #3
144.Dice game #4
145.Dice game #5
146.Dice game #6
34.Drug test problem
42.Drunken walk problem #1
222.Eight pieces of bread problem
147.Expected number of random numbers, uniformally distributed from 0 to 1, needed for the sum to be greater than 1?
218.Expected random numbers from [0,1] for the sum to exceed 1?
216.Expected rolls with two dice
158.Final Jeopardy problem
175.Five ants on a pentagon problem
230.Five coins problem
108.Five people, a pile of coconuts and a monkey problem #2
85.Five pirates and a 1000 coins problem
162.Five pumpkins problem
98.Five rectangles in a square problem
112.Five socks problem
229.Flight around the world problem
55.Flying bird in the wind problem
23.Fork in the road problem
10.Four businesses on a circle problem
111.Four circles problem
159.Four couples on a deserted island problem
29.Four dogs and a square problem
151.Four mathematicians problem
95.Four people, a bridge, and a flashlight problem
148.Four people, bridge, and flashlight problem
14.Four pints of beer problem
68.Four weights and a scale problem
73.Free gift in the cereal box problem #1
74.Free gift in the cereal box problem #2
134.Free trade problem
28.Furniture factory problem
75.Gift exchange problem
114.Gold mining problem
220.Good Will Hunting problem
137.Grave digging problem
25.Guess the age problem
235.Hanging rope problem
211.Hat and river problem
156.Heat-seeking missle problem
123.Height of a pentagon problem
47.Height of pentagon problem
78.House painting problem
87.How far can the plane fly problem
171.How many ways to get from A to C problem
135.How much is that puppy problem
170.How old am I problem
169.Hungry spider problem
63.Impossible to draw figure problem
188.Infinite fraction problem
133.Inheritance problem
153.Insurance company problem
67.Insurance in blackjack problem
91.Keno problem
205.Keno with Replacement
40.Land and sea race problem
163.Large tank with 10 outlets problem
172.Late train problem
21.License plates and a scale problem
35.Light bulb problem #1
36.Light bulb problem #2
70.Lottery problem
187.Marching soldiers problem
208.Maximum volume of a cylinder problem
242.Maximum volume of cone
51.Maximum volume of cone problem
53.Mean distance between two points in a square problem
38.Meeting at a restaurant problem
81.Military attack problem
166.Miss America problem
186.Monty Hall problem
90.Mortgage payment problem
122.Mouse and a cube of cheese problem
20.Nine minute egg problem
71.Nine pearls and a scale problem
203.One-Card Poker
160.Paint mixing problem
105.Parking cars problem
89.Pass line and odds problem
82.Pass line bet problem
177.Picking apples problem
115.Poissoned win problem
161.Poker problem
213.Poker theory game #1
215.Poker theory game #2
225.Poker theory game #3
226.Poker theory game #4
94.Pothole problem
62.Probabilities in poker problem
77.Probability of gender problem
1.Probability of n points in a semicircle problem
100.Pythagorean problem
192.Rock/Paper problem
193.Rock/Paper/Scissors problem
233.Rook in the corner problem
116.Roulette problem
191.Roulette problem
139.Roulette promotion problem
176.Roulette promotion problem
119.Round table in a square room problem
207.Rubik's Cube problem
33.Russian roulette problem
138.SEND+MORE=MONEY problem
60.Screw your neighbor problem
243.Secret Santa
231.Semi-circle inscribed in a quarter-circle problem
178.Serial number problem
129.Sicherman dice problem
18.Sideways tank of gas problem
124.Small town election problem
2.Snow plow problem
234.Solve (x^2-15x+55)^(x^2-9x+20)=1
217.Solve epi*i
65.Spirograph problem
209.Square wheel problem
185.Stick and buz saw problem
45.Surface area of Colorado problem
93.Swimming pool dilution problem
126.The Price is Right bidding problem
69.The Price is Right wheel problem #1
104.The Price is Right wheel problem #2
88.Three Surgeons, Two Gloves, and a Patient
237.Three ants problem
173.Three card problem
106.Three circles and a line problem
236.Three circles problem #3
15.Three door problem
79.Three humans, three monkeys, and a boat problem
212.Three logicans game #3
198.Three logicians game #1
199.Three logicians game #2
101.Three men and three questions problem
12.Three men, a bell boy, and a motel room problem
96.Three people, a bridge, and a bicycle problem
5.Three wise men and mischievous boy problem
214.Three-player double-or-nothing game
197.Three-player random number game
131.Tiger and the lake problem
83.To confess or not confess problem
140.Toothpick problem
183.Train station meeting problem
182.Triangular field problem
92.Trigonometry problem
76.Two bags and marble problem
109.Two bags of M&Ms problem
238.Two boards and a moat
30.Two boats problem
157.Two boats problem
22.Two brothers and a flock of x sheep
52.Two children problem
16.Two coins problem
164.Two courier pigeons problem
201.Two dice question, twelve before two sixes.
6.Two envelope problem
227.Two ferries problem
117.Two incense sticks problem
136.Two marble collections problem
59.Two primes problem
180.Two switches problem #1
181.Two switches problem #2
196.Two-player random number game
48.Volume of dodecahedrom problem
8.Volume of octahedrom problem
7.Volume of tetrahedron problem
167.Wagon wheel problem
121.Wait for a 6 problem
43.Wall and two houses problem
41.Water flow and tank problem
210.What holds more water, a cup or cone?
232.Which is more e^pi or pi^e?
13.Wine and cigar problem
54.Work or pleasure problem
50.World series problem
120.Yahtzee problem
39.Zeros and ones problem

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