A Quick brain teaser...

[EoinConway]

You could also have (132 - 45 + 6 + 7 = 100)
& (7 + 65 + 24 + 3 + 1 =100)

Another slightly trick one
15+36+47+2=100

 

[Silly Sausage]

Imagine a wire cube made from twelve 1 ohm resistors.
What would be the resistance between 2 opposite corners (not on the same face, different question) of said cube?

 

[telectrix]

Imagine a wire cube made from twelve 1 ohm resistors.
What would be the resistance between 2 opposite corners (not on the same face, different question) of said cube?

1/9 ohms or 0.1111111

 

[MarkieSparkie]

From my circuit analysis of the resistor cube I get 5/60Ω