What is the missing number?
[4956] What is the missing number? - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 95 - The first user who solved this task is Djordje Timotijevic
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What is the missing number?

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 95
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #riddles
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An elderly gentleman of 85 fea...

An elderly gentleman of 85 feared his wife was getting hard of hearing. So one day he called her doctor to make an appointment to have her hearing checked. The Doctor made an appointment for a hearing test in two weeks, and meanwhile there's a simple informal test the husband could do to give the doctor some idea of the state of her problem.
"Here's what you do," said the doctor, "start out about 40 feet away from her, and in a normal conversational speaking tone see if she hears you. If not, go to 30 feet, then 20 feet, and so on until you get a response."
That evening, the wife is in the kitchen cooking dinner, and he's in the living room. He says to himself, "I'm about 40 feet away, let's see what happens."
Then in a normal tone he asks, "Honey, what's for supper?" No response.
So the husband moved to the other end of the room, about 30 feet from his wife and repeats, "Honey, what's for supper?" Still no response.
Next he moves into the dining room where he is about 20 feet from his wife and asks, "Honey, what's for supper?" Again he gets no response.
So he walks up to the kitchen door, only 10 feet away. "Honey, what's for supper?" Again there is no response.
So he walks right up behind her. "Honey, what's for supper?"
"Damn it Earl, for the fifth time, CHICKEN!"
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John Dollond

Born 10 Jun 1706; died 30 Nov 1761 at age 55.English optical instrument maker of optical and astronomical instruments who developed (1758) and patented an achromatic (non- colour- distorting) refracting telescope and a practical heliometer, a telescope used to measure the Sun's diameter and the angles between celestial bodies. In the 1730's, Chester More Hall, an attorney with an interest in telescopes, first discovered that flint glass appeared to have a greater color dispersion than crown glass did at the same magnifications. Hall reasoned that if he cemented the concave face of a flint glass lens to the convex face of a crown glass lens, he could remove the dispersion properties (and thus, chromatic aberration) from both lenses simultaneously. Dollond learned of the technique in the 1750's and developed it.
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