When Luke, the new kid, aske...
[4653] When Luke, the new kid, aske... - When Luke, the new kid, asked how old Annabelle was, she replied, ''In two years, I'll be twice as old as I was five years ago.'' How old is Annabelle? - #brainteasers #math #riddles - Correct Answers: 55 - The first user who solved this task is Djordje Timotijevic
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When Luke, the new kid, aske...

When Luke, the new kid, asked how old Annabelle was, she replied, ''In two years, I'll be twice as old as I was five years ago.'' How old is Annabelle?
Correct answers: 55
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #riddles
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Lost In A Balloon

Two hobbyists get into their balloon for an excursion. After a while, the wind unexpectedly picks up, and the balloon goes out of control. The two balloonists, with great effort, manage to keep the balloon stable, upright, and away from power lines. But they are lost. With more effort, they get the balloon near the ground. While floating over a country road, they see a man walking below. One of the balloonists calls down to him:
"We're lost! Can you tell us where we are?"
The man thinks for a while, looks down, looks up, looks down again, stares into space for a minute, and then cries out:
"You're in a balloon!"
The wind picks up, and the balloon floats off. After a moment, one balloonist says to the other:
"That man must be a manager."
"Why?"
"Three reasons. First, he took a long time to answer. Second, he was perfectly correct. Third, his answer was perfectly useless!"
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Jacques-Salomon Hadamard

Died 17 Oct 1963 at age 97 (born 8 Dec 1865).French mathematician who proved the prime-number theorem (as n approaches infinity, the limit of the ratio of (n) and n/ln n is 1, where (n) is the number of positive prime numbers not greater than n). Conjectured in the 18th century, this theorem was not proved until 1896, when Hadamard and also Charles de la Vallée Poussin, used complex analysis. Hadamard's work includes the theory of integral functions and singularities of functions represented by Taylor series. His work on the partial differential equations of mathematical physics is important. He introduced the concept of a well-posed initial value and boundary value problem. In considering boundary value problems he introduced a generalisation of Green's functions (1932).
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