How old is Maria?
[2643] How old is Maria? - Maria's age plus three has an integer square root. Three years ago, Maria's age was the square root. How old is Maria? - #brainteasers #math #riddles - Correct Answers: 87 - The first user who solved this task is Donya Sayah30
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How old is Maria?

Maria's age plus three has an integer square root. Three years ago, Maria's age was the square root. How old is Maria?
Correct answers: 87
The first user who solved this task is Donya Sayah30.
#brainteasers #math #riddles
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I am sorry doctor...

"I'm sorry doctor, I know this is unusual but I seem to have a lettuce stuck in my bottom!"
"Good grief," the doctor replies, "I'd better take a look."
"It's worse than that," the doctor says after the examination. "That's just the tip of the iceberg."
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Rail detector car

In 1928, a rail detector car was demonstrated near Poughkeepsie, N.Y. to representatives of the American Railway Association and of various railroads. Invented by Dr. Elmer Ambrose Sperry, it was designed to enable locating internal flaws in existing railroad tracks. This first car, car No. 101, was capable of travelling at 10 mph while examining one rail at a time. It had been previously field-tested 13 Jun 1928.
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