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Friday 29 May 2015

Solving logic problems



Allen, Bruce, Claire, Donna, and Emma were the top five finishers in their school's talent contest. They finished up filling, in no particular order, 1st, 2nd, 3rd, 4th, and 5th places. Oddly enough, the children came from, in no particular order, 1st, 2nd, 3rd, 4th, and 5th grades! In another startling coincidence, they all performed to the song "My Way" but they all did something different to the music. They either hummed, sang, tap-danced, whistled or yodelled.

Based on the clues, match names with order of finish, grades, and performances.

   1. none of the numbers in the order of finish were exactly the same as the grade numbers.
   2. Claire finished in front of Allen but behind the singer, and Donna, and the tap-dancer too, but those last three people are not necessarily in any particular order.
   3. Emma finished behind Bruce but ahead of Donna.
   4. the singer was in 3rd grade and the tap dancer was in 1st grade.
   5. the child that was the hummer deserved to finish in last place and did finish there.
   6. the yodeller was in 4th grade.
Your task: to try and work out who came where.
 First, we need to work out what the variables are that we have to slot in, We have the names, ABCDE, we have the grades, 12345, and the places 12345, and the performances, hstwy. Now we are ready to begin.
The trick is to draw up a table, and then begin eliminating the impossibles. To give you a start, I have applied two statements: you can carry on from there.


After applying statement 1:
Place
1
2
3
4
5
Grade
2345
1345
1245
1235
1234
Name
ABCDE
ABCDE
ABCDE
ABCDE
ABCDE
Performance
hstwy
hstwy
hstwy
hstwy
hstwy


 After applying statement 2:
Place
1
2
3
4
5
Grade
2345
1345
1245
1235
1234
Name
BDE
BDE
BDE
C
A
Performance
hstwy
hstwy
hstwy
hwy
hwy

 After applying statement 3:
Place
1
2
3
4
5
Grade
2345
1345
1245
1235
1234
Name
B
E
D
C
A
Performance
hstwy
hstwy
hstwy
hwy
hwy

 Now go back an apply statement 2 again...

From here, you're on your own :-)


General note that I am adding to some of my blog entries: I have lots of different interests. If some area interests you, look at the very end and you will see a set of tags called labels. These are hot links that will give you a list of other articles with the same tag/label.

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