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Description
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Content
- Cover
- Introduction, Contents and Copyright
- Some numbers with many prime factors
- Some numbers with factors only close to the square root
- Some fractions which cancel satisfyingly
- Squares of integers to 100
- Cubes of integers to 100
- Fourth powers of integers to 100
- Fifth powers of integers to 30
- Sixth powers of integers to 30
- The first 200 triangle numbers
- Pascal's triangle
- A curious triangle
- Factorials
- Prime numbers
- The sieve of Eratosthenes
- Twin primes
- Primes to 5000
- Primes 5000 -10000
- Finding larger primes
- A very large prime
- Mersenne primes
- Modular arithmetic
- Fermat's little theorem
- Pseudoprimes
- Testing a very large number
- Counting the number of primes
- Goldbach's theorem
- Perfect numbers
- Pythagorean triples
- A hypoteneuse in two ways
- A hypoteneuse in four ways
- Generating Pythagorean triples
- A curious proportion
- Fermat's last theorem
- Fractions into decimals
- Cyclic decimals
- Number 1/n which repeat in (n/1) digits
- Some curious relationships
- Some curious approximations
- Some curious products
- Fibonacci numbers
- 3 x 3 magic squares
- A 3 x 3 multiplicative magic square
- 4 x 4 magic squares
- 5 x 5 magic squares
- Concentric or embedded magic squares
- 1000 random numbers
- Random numbers on a computer
- Pi to 1000 decimal places
- e to 1000 decimal places
- Square root of 2 to 1000 decimal places
- The Golden ratio to 1000 decimal places
- Numbers in base 10
- Numbers in bases 9 and 8
- Numbers in bases 7,6,5,4,3,2
- Numbers in base 12
- Numbers in base 16
- Back cover
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