# WONDER #1411: How Does a Calculator Work?

Question **1** of **3**

## In what year did the Casio Computer Company release the worldâ€™s first all-electric compact calculator?

- 1865
- 1776
- 1923
- 1957

Question **2** of **3**

## Integrated circuits contain what that can be turned on and off with electricity to perform mathematical calculations?

- transistors
- LCDs
- LEDs
- vacuum tubes

Question **3** of **3**

## How many digits are used in a binary, base-two number system?

- 1
- 2
- 3
- 4

Check your answers online at https://wonderopolis.org/wonder/how-does-a-calculator-work.