# Book:Daniel Shanks/Solved and Unsolved Problems in Number Theory

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## Daniel Shanks:

## Daniel Shanks: *Solved and Unsolved Problems in Number Theory*

Published $\text {1962}$.

### Subject Matter

*Why is the force of gravity at double the distance reduced by a factor of $4$? Why is the factor apparently $4$ exactly, rather than $4$ approximately? Probably because we live in a space of exactly $3$ dimensions.*

### Contents

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## Cited by

## Sources

- 1986: David Wells:
*Curious and Interesting Numbers*... (previous) ... (next): $10$ - 1997: David Wells:
*Curious and Interesting Numbers*(2nd ed.) ... (previous) ... (next): $10$