Tatyana Finkelstein's            

Mathematics for  Complete Slackers

.net    alpha ver. 0.001
Diamond School | Omega 8 Teachers | ClassLink Directory | Math Team | PROMYS at BU

Bottom | Homework | Extra Problems | River Puzzle | Mystery Machine | Kye Puzzle  


Dr. Anatoly Okunev needs our help!        Short Stories by David Finkelstein




  The River Crossing Puzzle:


To start, push The Big Blue Round Button.     RESTART

To solve, help all eight people cross to the other side of the river while following these Rules:

(1)  Someone must be on the raft to pilot it, but no more than 2 people.

(2)  Children cannot go on the raft without adults.

(3)  Policeman cannot leave Inmate with any other person.

(4)  Mom cannot leave a Girl with Dad.

(5)  Dad cannot leave a Boy with Mom.


TIM: A Mystery Machine:  This is a video capture of a working virtual machine built using the program "The Incredible Machine" (a.k.a. TIM, the "Contraptions" edition).

Play video  Can you explain exactly what this machine is doing?     [A Hint]

Each time a ball rolls onto the seesaw in the lower left corner, causing the second ball to fly up, counts as 1 step. Can you tell in which position each of the other 4 seesaws will be after 100 steps?

KYE: A Maze Game:     Kye is a puzzle game, similar to Sokoban. Here, is you (the main character named Kye); is a diamond (to solve the puzzle, all diamonds must be gathered); is a one-way door (you can only go through it in one direction, but not in the other, in this case all doors let you walk out of the maze, but not back in); is a sticky thing (a magnet), it follows you until you make a turn (or walk through a door); all the grey stuff is just walls, they don't move.

Play video then explain what is going on here.     [A Hint]

If Kye is moving at the speed of 4 steps per second, can you tell approximately how long will it take to solve this puzzle?


Omega . . . . . "LAST BUT NOT LEAST"

 Homework:  6th grade   7th grade   8th grade

 The Extra Problems:  Complete sets in PDF format:


6th grade  7th grade  8th grade

 Top |Contact TF | Report a | SET Daily Puzzle | More SET puzzles at NY Times | TF's Useful Links |

TF's 2006 Sliffe Award | All 2006 Sliffe Winners |  Ms. Robinson | the RateMyTeacher link is no longer available |

2001 MathCounts Chapter Winners | 2001 MathCounts State Champions

1999 MathCounts National Champions | IMO | AMC | MathCounts | HMMT | CME at EDC | IAS/PCMI

We are recommended by LIFT2 ("Leadership Initiatives for Teaching and Technology" is a public/private partnership offering professional learning, graduate courses, and externships for middle and high school teachers of math, science, and technology).

Our friends' daughter, Katya Polishchuk, has passed away on November 1, 2006 after a long fight with a brain tumor. Katya was 5 years and 10 months old.

  visitors since July 4, 1776.    tmath home page  is hosted at  HostRocket      TF's LIFT2 files

Copyright 2006 Tatyana Finkelstein. All content is for educational use only. Every trademark is the property of its respective owner. Updated November 13, 2012 PageRank Tool