Revolution Puzzles

[Derrick]

I was playing around on my computer and came up with a new type of puzzle, at
least I haven't seen any like it before. The puzzle is explained in these
instructions:

http://imgur.com/a/xGEjg


Puzzles:

1.
http://i.imgur.com/oT8obys.png

2.
http://imgur.com/a/wRqst

3. The same solid from two different views:
http://i.imgur.com/2w0nj3i.png

4. Two different solids that were made from the same original shape but with
different axes of revolution:
http://i.imgur.com/v6I6RBG.jpg

5.
http://i.imgur.com/5ZA16rO.png


I would rate most of these puzzles as easy or maybe easy/moderate but I am
working
on some more challenging ones. I would appreciate any feedback if anyone is
interested in seeing more puzzles of this type.

[Ed Murphy]

[quoted text as spoiler space]

On 5/11/2013 3:12 PM, Derrick wrote:

> I was playing around on my computer and came up with a new type of puzzle, at
> least I haven't seen any like it before. The puzzle is explained in these
> instructions:
>
> http://imgur.com/a/xGEjg
>
>
> Puzzles:
>
> 1.
> http://i.imgur.com/oT8obys.png
>
> 2.
> http://imgur.com/a/wRqst
>
> 3. The same solid from two different views:
> http://i.imgur.com/2w0nj3i.png
>
> 4. Two different solids that were made from the same original shape but with
> different axes of revolution:
> http://i.imgur.com/v6I6RBG.jpg
>
> 5.
> http://i.imgur.com/5ZA16rO.png

1) division sign
2) pi
3) F (middle cross bar extends to left?)
4) Y
5) F pentomino (portion above middle cross bar is oversized?)

[mbuck]

X, I think.

[Derrick]

Thanks for the reply and taking a shot at all of them.

>1) division sign

Correct

>2) pi

Correct, the image at the link below shows a cross section of the pi symbol
solids.

http://i.imgur.com/KJka25Q.png

>3) F (middle cross bar extends to left?)
>4) Y
>5) F pentomino (portion above middle cross bar is oversized?)

These last three are not the intended answers.

[Derrick]

>>
>> 4) Y
>
>X, I think.

X is correct, the image the link shows cross sections of both solids:

http://i.imgur.com/9sRYNyP.jpg

[David B]

Spoiler
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1. Division sign

2. Pi

3. 4 see note

4. X

5. 4 see note


3 and 5 are the same shape (an open topped number 4 or F or whatever you
want to call it see diagram below in fixed width)

X X
XXXX
X

[Derrick]

>
>1. Division sign
>
>2. Pi
>
>3. 4 see note

>4. X
>
>5. 4 see note

These are all correct, below are the answer images for 3 and 5:


3.

http://i.imgur.com/lQpjls4.png


5.

http://i.imgur.com/7dBUZVc.png