Replace the question mark with a number
[3706] Replace the question mark with a number - MATH PUZZLE: Can you replace the question mark with a number? - #brainteasers #math #riddles - Correct Answers: 103 - The first user who solved this task is Djordje Timotijevic
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Replace the question mark with a number

MATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 103
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #riddles
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A couple is in bed sleeping wh...

A couple is in bed sleeping when there's a rat-a-tat-tat on the door.
The husband rolls over and looks at the clock, and it's half past 3 in the morning.ā€ I’m not getting out of bed at this time," he thinks, and rolls over. Then, a louder knock follows. So he drags himself out of bed, goes downstairs, opens the door, and there's a man standing there. It didn't take the homeowner long to realize the man was drunk.
"Hi there," slurs the stranger, "Can you give me a push?" "No, get lost. It's half past three and I was in bed," says the man as he slams the door. He goes back up to bed and tell his wife what happened and she says, "That wasn't very nice of you. Remember that night we broke down in the pouring rain on the way to pick the kids up from the baby-sitter and you had to knock on that man's house to get us started again? What would have happened if he'd told us to get lost?"
"But the guy was drunk," says the husband.
"It doesn't matter," says the wife.ā€ He needs our help and it would be the Christian thing to help him." So the husband gets out of bed again, gets dressed, and goes downstairs.
He opens the door, and not being able to see the stranger anywhere,
He shouts, "Hey, do you still want a push?"
And he hears a voice cry out, "Yeah, please."
So, still being unable to see the stranger he shouts, "Where are you?" The drunk replies, "Over here, on the swing."
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Black American invention

In 1888, a U.S. patent was issued for the railway signal to the Black American inventor, A.B. Blackburn (No. 376,362). The type of signal was that designed to be operated by the wheels of a train. A lever was depressed as a train wheel travelled over it, to remotely operate an alert through a mechanical linkage upon the passing of the train. It was designed for use upon a single track railway line for trains passing in one direction. To provide a signal for trains passing in the opposite direction, a similar apparatus would be applied on the opposite rail. This patent was an improvement in mechanical design of his earlier patent No. 309,517 on 23 Dec 1884, in which he also described how a gong was activated to provide the alert.«[Image: detail from patent diagram showinf device beside a section of rail.]
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