1) _______ is the first known calculating machine used for counting.

A) Napier's Bones

B) Slide Rule

C) Abacus




2) __________ is a predecessor to today's electronic calculator.

A) Difference Engine

B) Rotating Wheel Calculator

C) Abacus




3) Charles Babbage was an _______

A) Teacher

B) Engineer

C) Mathematician and Engineer




4) In Abacus the numbers are represented by beads close to ________.

A) Rightbar

B) Centerbar

C) Crossbar






5) John Napier Invented _______.

A) Abacus

B) Slide Ruler

C) Napier's Bones