A robber came into my store ...
[4464] A robber came into my store ... - A robber came into my store and stole $100 from the register without my knowledge. A few minutes later, the same guy came back with the $100 he stole and purchased $70 worth of items and I gave him $30 in change. How much money did I lose? - #brainteasers #riddles - Correct Answers: 102 - The first user who solved this task is Thinh Ddh
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A robber came into my store ...

A robber came into my store and stole $100 from the register without my knowledge. A few minutes later, the same guy came back with the $100 he stole and purchased $70 worth of items and I gave him $30 in change. How much money did I lose?
Correct answers: 102
The first user who solved this task is Thinh Ddh.
#brainteasers #riddles
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One day, a gynecologist got bored with his job…

So one day, I gynecologist got bored with his job. But he realized that he had spent many years training with his hands, and he decided he would switch to careers to something else that he could use his hands with. Not wanting the stress of being a medical professional, he decided to attend vocational school to learn to be an automotive mechanic. He worked really hard and studied day and night. When the results of his final exam came in, he was quite perplexed. It showed that he got 150% on the test. The doctor figured this had to be a mistake so he called his instructor at the vocational school.

Doc: there must be some mistake. It says I got a 150% on the final exam. Could you explain that?

Instructor: well, for the first part of the test you took apart the cars engine perfectly. That counted for 50 points of your test. Then you went and put the engine back together perfectly. That was another 50 points. But those last 50 points? Well that’s because none of us have ever seen anyone do it through the muffler before.

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Production of ammonia

In 1910, a U.S. patent for the Production of Ammonia was issued to Fritz Haber and Robert Le Rossignol (No. 971,501). This process could produce ammonia on a large scale directly from its component gases, hydrogen and nitrogen, by passing a mixture of them over heated finely-divided osmium metal used as a catalyst. A typical pressure of 175 atmospheres and a temperature of 550ºC could easily give an 8% by volume yield of ammonia. Although nitrogen makes up 80% of the air, as a gas it is quite unreactive. Despite its ready availability, nitrogen gas had previously been difficult to combine in a chemical form. Once nitrogen has been chemically combined in the form of ammonia, many other nitrogen compounds can be made.«
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