Calculate the number 1651
[7406] Calculate the number 1651 - NUMBERMANIA: Calculate the number 1651 using numbers [6, 2, 7, 4, 31, 649] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 1
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Calculate the number 1651

NUMBERMANIA: Calculate the number 1651 using numbers [6, 2, 7, 4, 31, 649] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
#brainteasers #math #numbermania
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The Chinese Doctor & The Lawyer

A Chinese Doctor can't find a job in a Hospital in the US, so he opens his own clinic and puts a sign outside
'GET TREATMENT FOR $20 - IF NOT CURED GET BACK $100.'
An American lawyer thinks this is a great opportunity to earn $100 and goes to the clinic.
Lawyer: 'I have lost my sense of taste.'
Chinese: 'Nurse, bring medicine from box No. 22 and put 3 drops in patient's mouth.'
Lawyer: 'Ugh. this is kerosene.'
Chinese: 'Congrats, your sense of taste is restored. Give me $20.'
The annoyed lawyer goes back after a few days to recover his money.
Lawyer: 'I have lost my memory. I cannot remember anything.'
Chinese: 'Nurse, bring medicine from box no. 22 and put 3 drops in his mouth.'
Lawyer (annoyed): 'This is kerosene. You gave this to me last time for restoring my taste.'
Chinese: 'Congrats. You got your memory back. Give me $20.'
The fuming lawyer pays him, and then comes back a week later determined to get back $100.
Lawyer: 'My eyesight has become very weak I can't see at all.'
Chinese: 'Well, I don't have any medicine for that, so take this $100.'
Lawyer (staring at the note): 'But this is $20, not $100!!'
Chinese: 'Congrats, your eyesight is restored. Give me $20'

 

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Magnetising metals

In 1744, Gowan Knight presented his research on magnetising metals to the Royal Society. The method he discovered for permanently magnetising hard steels. The use of steel instead of soft iron greatly improved the otherwise crude compass needles used by England's Royal Navy, which then had a much longer magnetized life. Knight took out a patent for his compass in 1766. He devised better ways to suspend compass needles, and introduced the rhomboid shape now common for compass needles.Reference: Philosophical Trans., No. 474, p. 161
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