Find number abc
[6162] Find number abc - If 8ab0c - cb715 = c288a find number abc. Multiple solutions may exist. - #brainteasers #math - Correct Answers: 21 - The first user who solved this task is Fazil Hashim
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Find number abc

If 8ab0c - cb715 = c288a find number abc. Multiple solutions may exist.
Correct answers: 21
The first user who solved this task is Fazil Hashim.
#brainteasers #math
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A mother-in-law sent two ties...

A mother-in-law sent two ties to her son-in-law. Some weeks later, she was invited for lunch, and so he wore one of them in the hope of pleasing her.
The meal was a tense and uncomfortable one, with the mother-in-law maintaining a stony silence.
Finally she spoke. "Alright, what's wrong with the other tie?"
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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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