Friday 30th June 2023
Difficulty: Hard
Abacus (Quiz #224)
(Public domain)
1. What is the plural of "abacus"?
2. What is the number represented on the abacus in the picture above?
3. How many of these operations can be performed on an abacus?
- addition
- subtraction
- multiplication
- division
- finding the square root of whole numbers
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