What is the missing number?
[5769] What is the missing number? - What is the missing number? - #brainteasers #math #riddles - Correct Answers: 66 - The first user who solved this task is Nasrin 24 T
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What is the missing number?

What is the missing number?
Correct answers: 66
The first user who solved this task is Nasrin 24 T.
#brainteasers #math #riddles
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Would you mind telling me...

"Would you mind telling me, Doctor," Bob asked, "how you detect a mental deficiency in somebody who appears completely normal?"
"Nothing is easier," he replied. "You ask him a simple question which everyone should answer with no trouble. If he hesitates, that puts you on the track."
"What sort of question?"
"Well, you might ask him, 'Captain Cook made three trips around the world and died during one of them. Which one?'
Bob thought for a moment, and then said with a nervous laugh, "You wouldn't happen to have another example would you? I must confess I don't know much about history."
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Heart pacemaker

In 1958, Dr Åke Senning implanted the first internal heart pacemaker. Earlier the same year, Rune Elmqvist (born in 1906) invented this pacemaker, designed to be implanted in a subcutaneous pouch in a patient suffering a cardiac disease. It used only two transistors and was the size of a hockey puck. The apparatus sent pulses to the cardiac muscle to establish normal and regular contractions. Dr. Senning (born in 1915) carried out the first pacemaker installation at the Karolinska Institute of Stockholm. Although this prototype worked for only three hours, the Swedish man, Arne Larsson, who received this pacemaker, 40 years and 26 pacemakers later was still enjoying a full, normal life at age 83.
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