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The most difficult math riddles

A list of math related questions that are most often answered incorrectly
Mathematics quiz
Augustus was born on 1 January 10BC. Which birthday did he celebrate at 1 January 10AD?
19
20
21
80
There was no year number zero. There were only 1999 years between 1000BC and 1000AD.
Gizem İsmailoğlu
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0
Correct this question
5
Very interesting!
calendar riddles
How many edges does a cube have?
4
8
12
16
A cube has six square faces, each of which has four edges - but each edge is shared with another face.
globalquiz.org
Correct this question
0
Correct this question
0
Very interesting!
geometry riddles
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Mathematics quiz