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Mathematics
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Why?
5
How many known Fermat primes are there?
2
3
4
5
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Why?
5
What is the value of the central cell in the first non-trivial normal magic square?
3
5
7
9
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Why?
5
What is the third-smallest prime number?
2
3
5
7
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Why?
8
What is the mathematical significance of the number 8?
It is a prime number
It is a perfect square
It is a Fibonacci number
It is a prime aliquot sum
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Why?
8
What is the shape of the digit 8 in Arabic numerals?
A straight line
A circle
A curve resembling an uppercase H
A triangle
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Why?
0
What does 0 represent in decimal notation?
The absence of a digit
The largest digit
The smallest digit
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Why?
0
In mathematical terminology, what is 0?
The additive identity of numbers
The multiplicative identity of numbers
The largest prime number
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Why?
9
What is the highest single-digit number in the decimal system?
0
8
9
10
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Why?
9
In the Hindu–Arabic digit system, what shape did the digit 9 resemble?
Circle
Triangle
Question mark
Square
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Why?
Hyperbola
What is the eccentricity of a hyperbola?
The distance between the foci
The curvature of the arms
The ratio of the focal distance to the major axis
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