Grade 5 Early calculating devices

___________ is the oldest counting board.

• Salamis tablet

• Napiers bones

(a)   was invented by china.

Eratosthenes invented a simple algorithm called _____________

• Sieve of Earthern

• Sieve of Eratosthenes

• Save of Eratosthenes

Napiers bone was also known as ___________

• Napier's calculator

• Napier's rod

Which year was Napier's bone invented _____________

• 1617

• 1716

• 6171

Leibniz's calculator was also known as _____________

• Set rocket

• Step Reckoner

Who invented Jacquard Loom?

• John Marie

• Joseph Marie Jacquard

Who helped Charles Babbage to developed Analytical Engine?

• Lady Ada Augusta Lovelace

• Ada Augustine

Herman Hollerith invented __________

• Tabulating machine

• Tablet

(a)   was first electro mechanical computer.