If light can travel for a long distance, why is it that if you light a flashlight at night, the light will only go on for about 30 meters?

You’ve accidentally stumbled on an obscure topic here, and it’s something you do on a Wednesday afternoon in HND EME and then immediately forget as soon as you leave the classroom only to get a shock when it pops up on that term’s electrical paper.

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What numbers should never be picked when choosing lottery ticket numbers?

Before suggesting numbers to avoid, I’ll explain why they should be avoided.

No number is any more, or any less, likely to appear in a lottery draw than any other number. So it is just as likely that tonight’s UK lottery numbers will be 1, 2, 3, 4, 5, 6 as any other combination, say 3, 26, 35, 41, 47, 49.

Why can you only fold paper 7 times, regardless of its size? Are there any other materials that can be folded more times, or is 7 some kind of hard cap?

The Mythbusters managed to break the 7 fold barrier but they started with a piece of paper that was about half the size of a football field.