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Inventions

Inventions
When were bar code scanners invented?

1940s
1960s
1970s
1950s

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Inventions
For over 500 years, paper was only available and sold as single sheets. In 1902, an inventive Australian used half size sheets of paper, a bit of glue and cardboard to create the what?

Calendar
Telephone Book
Notepad
Notice Board

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Inventions
What Thomas Davenport invented?

Screw propellor
Electric streetcar
Sleeping (railway) car
Chesterfield

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Inventions
In which decade was the transistor invented?

1960s
1950s
1980s
1940s

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Inventions
Until Victorian times, chocolate was thought of as a drink. When did the first chocolate bar appear?

1825
1828
1831
There is no sure date

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Inventions
Who invented Automobiles using gasoline?

Karl Benz
Evangelista Torricelli
Leo H Baekeland
Kirkpatrick Macmillan

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