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Calculate A+B

Determine the pattern and calculate A+B. Author: Dejan Marsenic (Serbia)

Correct answers: 39

The first user who solved this task is Sanja Šabović.

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In the doctors office two pati...

In the doctors office two patients are talking.
"You know, I had an appendectomy last month and the doctor left a sponge in me by mistake."
"A sponge!" exclaims the other. "Does it hurt much?"
"No...no pain at all," says the first, "but...boy, do I get thirsty!"

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Calliope patent

In 1855, Joshua C. Stoddard of Worcester, Massachusetts, received a patent for his calliope. The first instrument consisted of 15 whistles, of graduated sizes, attached in a row to the top of a small steam boiler. A long cylinder with pins of different shapes driven into it ran the length of the boiler. The pins were so arranged that when the cylinder revolved, they pressed the valves and blew the whistles in proper sequence. The different shapes enabled the operator to play notes of varying length. Later, Stoddard replaced the cylinder with a keyboard. Wires running from the keys to the valves enabled the operator to play the instrument like a piano. He patented a successful hay rake in 1879 and a fire escape in 1884. He died on April 4, 1902.

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