Which number should replace the question mark?
[29] Which number should replace the question mark? - Which number should replace the question mark? - #brainteasers #math #riddles - Correct Answers: 518 - The first user who solved this task is BrainTeasers Mozgalice
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Which number should replace the question mark?

Which number should replace the question mark?
Correct answers: 518
The first user who solved this task is BrainTeasers Mozgalice.
#brainteasers #math #riddles
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Little Nancy was in the garden...

Little Nancy was in the garden filling in a hole when her neighbor peered over the fence. Interested in what the cheeky-faced youngster was up to, he politely asked, "What are you doing there, Nancy?"
"My goldfish died," replied Nancy tearfully without looking up, "and I've just buried him."
The neighbor was very concerned. "That's an awfully big hole for a goldfish, isn't it?"
Nancy patted down the last heap of dirt then replied, "That's because he's inside your fricking cat."
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Steam percussion rock drill

In 1849, Joseph J. Couch received the first U.S. patent for a steam-powered percussion rock drill (No. 6,237) as “improved machinery for drilling rocks”. It was driven by steam power and acted without need of gravity supplying any part of the motion. A sliding drill support frame enabled it to be operated in any desirable position or direction. Power was supplied by the piston of a steam cylinder connected to a suitable steam generator. The machine would be held stationary as the rotating drill was thrown against the rock. The drill rod would disengaged at each stroke, and travel with its own momentum, so that upon striking the rock, the shock was not transmitted back to the rest of the machine, preventing it from damage. After each blow, the tool was seized by means of friction-grips to retract and repeat.«
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