BRAIN TEASERS

# Calculate the number 511

NUMBERMANIA: Calculate the number 511 using numbers [4, 1, 3, 7, 78, 597] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
The first user who solved this task is Nílton Corrêa de Sousa.
#brainteasers #math #numbermania

A customer at Green's Gourmet Grocery marveled at the proprietor's quick wit and intelligence.
"Tell me, Green, what makes you so smart?"
"I wouldn't share my secret with just anyone," Green replies, lowering his voice so the other shoppers won't hear. "But since you're a good and faithful customer, I'll let you in on it. Fish heads. You eat enough of them, you'll be positively brilliant."
"You sell them here?" the customer asks.
"Only \$4 apiece," says Green.
The customer buys three. A week later, he's back in the store complaining that the fish heads were disgusting and he isn't any smarter.
"You didn't eat enough, " says Green. The customer goes home with 20 more fish heads. Two weeks later, he's back and this time he's really angry.
"Hey, Green," he says, "You're selling me fish heads for \$4 apiece when I can buy the whole fish for \$2. You're ripping me off!"

"You see?" says Green. "You're getting smarter already!"

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### Heike Kamerlingh Onnes

Died 21 Feb 1926 at age 72 (born 21 Sep 1853). Dutch physicist who was awarded the 1913 Nobel Prize for Physics for his work on low-temperature physics in which he liquified hydrogen and helium. From his studies of the resistance of metals at low temperatures, he discovered superconductivity (a state in which certain metals exhibit almost no electrical resistance at a temperature near absolute zero).«
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