What is the missing number?
[4961] What is the missing number? - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 296 - 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: 296
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #riddles
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The Pastor's Wife

Gladys was the preacher's wife and accompanied her husband each Sunday to church. One particular Sunday when the sermon seemed to go on forever, many in the congregation fell asleep. After the service, to be sociable, she walked up to a very sleepy looking gentleman. In an attempt to revive him from his stupor, she extended her hand in greeting, and said, "Hello, I'm Gladys Dunn." To which the gentleman replied, "You're not the only one!"
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Safety lamp

In 1816, Sir Humphry Davy's safety lamp was first used in a coal mine. Deadly explosions had been a continual hazard caused by the flammable gas, methane, leaking out of the coal seams ignited by the flame of a miner's lamp. There had been previous attempts by others to make a safety lantern. Davy applied a scientific approach to determine the suitable fineness of wire gauze placed around the flame which would avoid ignition of flammable gas outside. He determined that the holes in the gauze should be less than 1/22 inch in diameter, and that the wire itself should be between 1/40 to 1/60 inch thick. Since the flame changed colour in the presence of methane, it also served as a warning to the miner to take protective action.«[Image: Davy safety lamp, circa 1816.]
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