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Khoi Nguyen

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144. Peca Nikolic 18
145. Ilan Amity 17
146. Khoi Nguyen 17
147. Andrew John McKechnie 16
148. John Callahan 16
last 3 solved tasks
Tricky math! Can you solve this? If 11+11=4 and 12+12=9 Then 13+13=?
MATH PUZZLE: Can you replace the question mark with a number?
MATH PUZZLE: Can you replace the question mark with a number?

Cosmic rays generate electricity

In 1939, cosmic rays entering a Geiger-Mueller counter produced electrical impulses used to control electrical power. This first ever such event, was used for the illumination ceremony of the 1939 New York World's Fair. The counter, at the Hayden Planetarium, New York City, switched on an electrical circuit wired to a display at the Lagoon of Nations where relays activated local battery circuits ringing bells and flashing lights to signal each capture of a cosmic ray. Albert Einstein as guest speaker explained cosmic rays. Sadly his accent and faulty amplification made his words incomprehensible to the crowd. Upon the tenth ray's signal, a huge light was to be turned on to illuminate the 600-ft Trylon triangular spire, but the power source failed.«[Image: Trylon spire.]

At school one morning the teac...

At school one morning the teacher asked little Johnny what he had for breakfast. Little Johnny said, well, on my way to school I come cross this Apple tree, so I climbed up there and started eating apples. I guess I eat about six, said little Johnny. No, said the teacher, it’s ate! Little Johnny said well it could've been eight I don't remember.
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