Multiple choice

The oldest device for calculation is

  1. calculator

  2. modem

  3. computer

  4. abacus

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

The abacus is the oldest known calculating device, dating back to around 2400-2300 BCE in Mesopotamia. It consists of beads that slide on rods to perform arithmetic operations. The abacus was widely used in ancient China, Rome, and other civilizations before modern calculators.