Find number abc
[7742] Find number abc - If 6bcaa - aaaba = 5a690 find number abc. Multiple solutions may exist. - #brainteasers #math - Correct Answers: 1
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Find number abc

If 6bcaa - aaaba = 5a690 find number abc. Multiple solutions may exist.
Correct answers: 1
#brainteasers #math
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You will spend eternity here

The devil meets him at the gate and says, "Alright, you have died and come to hell. You will spend eternity here, but you get to choose how to spend it. You may choose one of these three doorways. Once you choose a door, you may not change it. So let's get started."

The devil opens Door One. The guy looks in and sees a couple of people standing on their heads on a Concrete floor. The guy says, "No way, let's move on."

The devil opens Door Two. The guy sees a few more people standing on their heads on a Wood floor. The guy says, "No way, let's move on."

The devil opens Door Three. The guy sees a bunch of people standing knee-deep in cow manure drinking coffee. The guy says, "Great, this is the one I will chose." The devil says, "OK, wait right here, I will get you some coffee."

The guy settles in with his coffee thinking that this isn't so bad. What's the big deal?

After about 10 minutes a voice comes over the loud speaker saying, "Coffee break's over. Back on your heads!"

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Indelible pencil

In 1866, the first U.S. patent for an indelible pencil was issued to Edson P Clark of Northampton, Mass. as an "Producing Indelible Writing on Linen and other Fabrics" (No. 56,180). The pencil-lead was composed of gypsum (a hard moisture-resistance compound) and black lead (coloring agent, with optional asphaltum or lamp-black) and silver nitrate. It is the silver nitrate which blackens to make the indelible mark by the action of light or heat. The black lead and gypsum permit the pencil to be readily pointed. The patent described cementing the filling with shellac into grooved cedar wood. Clark held an earlier patent for an indelible composition, but described without the wood jacket (No. 24,195 on 31 May 1859).
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