MATH JAMZ!'s Journal|
[Most Recent Entries]
Below are the 15 most recent journal entries recorded in
MATH JAMZ!'s LiveJournal:
|Wednesday, May 5th, 2010|
Alice secretly picks two different real numbers by an unknown process and puts them in two (abstract) envelopes. Bob chooses one of the two envelopes randomly (with a fair coin toss), and shows you the number in that envelope. You must now guess whether the number in the other, closed envelope is larger or smaller than the one you’ve seen.
Is there a strategy which gives you a better than 50% chance of guessing correctly, no matter what procedure Alice used to pick her numbers?
|Wednesday, April 14th, 2010|
Rh Neg Blood
Riddle: Over a period of many generations, what will the effect of RhoGAM be on the population of Rh Negative blooded people in the world? Will it decrease, increase, or stay the same? Why?
|Monday, April 14th, 2008|
|Sunday, April 13th, 2008|
First two today were too easy?
Three points are chosen at random inside a square. Each point is chosen by choosing a random x-coordinate and a random y-coordinate.
A triangle is drawn with the three random points as the vertices. What is the probability that the center of the square is inside the triangle?
1)Can this be solved?
2a)If yes, whats the answer?
2b)If no, why not?
What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first and second, and the last is three times the second?
A. The number of false statements here is one.
B. The number of false statements here is two.
C. The number of false statements here is three.
D. The number of false statements here is four.
Which of the above statements is true?
|Wednesday, February 6th, 2008|
There are four cards in front of you, each with a letter on one side and a number on the other:
Rule: If there is a vowel on one side, there must be an even number on the other side. Task: Which two cards must be turned over in order to determine if the rule is true?
|Tuesday, February 13th, 2007|
|Monday, February 12th, 2007|
A quick one
This evening, I was at my drug dealers house, eating pizza and watching the Lakers lose to the Cavaliers, and I observed five different people buy five different items. Each person bought precisely one item and the cost of each of the items was different.
From the clues given, can you determine the first and the last names of each person, the items purchased by each person and the cost of each of the items? If you can, then do; if you can't, then commit seppuku with a traditional japanese tantō, if you cannot obtain an appropriate tantō, then you may live, for now.
First Names: Ella, Diana, Dave, George, Francis
Last Names: Greenfield, Hasselhoff, Bloomerstein, Bush, Jacksonberg
Items: Coke, Meth, Crack, Heroin, Ecstasy
Item Costs : $9.50, $12.00, $15.00, $18.00, $19.00
1. Francis’ last name is not Jacksonberg.
2. The man who bought the ecstasy paid the highest price which is precisely twice that of the crack.
3. The heroin sold for $4.00 less than the ecstasy and was purchased by Hasselhoff.
4. Ms. Greenfield bought the meth for precisely two-thirds of what the coke cost.
5. The items bought by Bush and Dave were ecstasy and coke (not necessarily in this order).
6. Ms. Greenfield offered to suck my wang for more drug money. I declined, because I only had enough money for my own drugs.
7. George paid $18.00 for his item.
8. None of Francis, Diana and Hasselhoff paid more than $15.00 for their items
|Sunday, April 2nd, 2006|
|Monday, September 5th, 2005|
Apryl, Beth, and Carla are three remarkable women, each having some remarkable characteristics.
(1) Just two are intelligent, just two are beautiful, just two are artistic, and just two are rich.
(2) No one has more than three of those characteristics.
(3) Of Apryl it is true that: if she is intelligent, she is rich.
(4) Of Beth and Carla it is true that: if she is beautiful, she is artistic.
(5) Of Apryl and Carla it is true that: if she is rich, she is artistic.
Who is not rich?
show your reasoning
|Saturday, September 3rd, 2005|
|Thursday, September 1st, 2005|
The Old Monty Hall Problem
Old but still powerful, like Sean Connery. also, still sexually intimidating.
Suppose you're on a game show, and you're given the choice of three doors.
Behind one door is a Jet Black BMW 650i coupe with a cream beige dakota leather interior and the sport package; behind the other doors, goats.
You pick a door, say #1, and the host, who knows what's behind the doors, reveals a goat behind door #3.
He says to you:
"Do you want to switch to door #2?"
Is it to your advantage to switch your choice of doors?
why or why not?
|Wednesday, August 31st, 2005|
|Sunday, August 28th, 2005|
Arlene(A), Brenda(B), Cheryl(C), Daniel(D), Emmett(E) and Farley(F) stayed in a hotel.
1) Each stayed in a different one of six rooms as shown here, identified by his initials :
2) One of the six murdered one of the other five.
3) If the murderer and the victim stayed in rooms that did not border on each other, then Arlene or Farley was the victim.
4) If the murderer and the victim stayed in rooms that bordered on different numbers of rooms, then Brenda or Cheryl was the murderer.
5) If the murderer and the victim stayed in rooms that were different in size, then Daniel or Emmett was the murderer.
Who was the murderer? Who was the victim?