Calculate the number 6820
[3808] Calculate the number 6820 - NUMBERMANIA: Calculate the number 6820 using numbers [9, 2, 9, 9, 36, 361] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 22 - The first user who solved this task is Manguexa Wagle
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Calculate the number 6820

NUMBERMANIA: Calculate the number 6820 using numbers [9, 2, 9, 9, 36, 361] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 22
The first user who solved this task is Manguexa Wagle.
#brainteasers #math #numbermania
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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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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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