Solution to Up, Down, and All Around

by Naomi Cliffer, Sasen, & Laurel Bobrow

First, find all the pictures.

1/1.jpg
4-3
1/2.jpg
4-2
1/3.jpg
4-4
1/4.jpg
4-1
1/5.jpg
4-0
2/1.jpg
54-4
2/2.jpg
54-0
2/3.jpg
54-1
2/4.jpg
54-2
2/5.jpg
54-3
3/1.jpg
3-4
3/2.jpg
3-3
3/3.jpg
3-2
3/4.jpg
3-0
3/5.jpg
3-1
4/1.jpg
36-1
4/2.jpg
36-3
4/3.jpg
36-0
4/4.jpg
36-2
4/5.jpg
36-4
5/1.jpg
32-1
5/2.jpg
32-2
5/3.jpg
32-3
5/4.jpg
32-0
5/5.jpg
32-4
6/1.jpg
38-3
6/2.jpg
38-4
6/3.jpg
38-1
6/4.jpg
38-2
6/5.jpg
38-0
7/1.jpg
66-0
7/2.jpg
66-3
7/3.jpg
66-2
7/4.jpg
66-1
7/5.jpg
66-00
8/1.jpg
10-0
8/2.jpg
10-1
8/3.jpg
10-4
8/4.jpg
10-3
8/5.jpg
10-2
9/1.jpg
24-4
9/2.jpg
24-3
9/3.jpg
24-5
9/4.jpg
24-2
9/5.jpg
24-6
10/1.jpg
37-4
10/2.jpg
37-1
10/3.jpg
37-3
10/4.jpg
37-2
10/5.jpg
37-0

Treat each picture as a bit. Each picture of a floor is a 0, and each picture of a ceiling is a 1. Order each row by floor (low-order bits are low floors), and order the rows by building number.

Read off the answer, with A=1, etc.:

BuildingBinaryLetter
300101E
401110N
1000100D
2401111O
3210011S
3600011C
3701111O
3810000P
5401001I
6600011C

The answer is ENDOSCOPIC.


2006 MIT Mystery Hunt