Multiple choice

One of the oldest calculating device was ______.

  1. arithometer

  2. ready reckoner

  3. abacus

  4. None of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The abacus is one of the oldest known calculating devices, dating back to ancient civilizations around 3000 BCE. It consists of beads on rods used for arithmetic calculations. The arithmometer came much later (19th century), and 'ready reckoner' refers to printed calculation tables, not a physical device.