Category:Recreational Mathematics
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This category contains results about Recreational Mathematics.
Definitions specific to this category can be found in Definitions/Recreational Mathematics.
Recreational mathematics is a branch of mathematics which studies interesting mathematical phenomena for no reason but for the amusement and entertainment of the mathematician.
Subcategories
This category has the following 76 subcategories, out of 76 total.
A
- Amicable Triplets (4 P)
- Anagrams (1 P)
- Anomalous Cancellation (12 P)
C
- Cyclic Numbers (empty)
D
E
- Earthworm Sequence (1 P)
- EPORNs (5 P)
F
H
I
- Interesting Numbers (empty)
J
- Juggler Sequences (1 P)
K
- Kaprekar's Process (5 P)
L
- Loculus of Archimedes (2 P)
M
- Magic Hexagons (2 P)
- Multiplicative Magic Squares (9 P)
O
- Orchard Planting Problem (13 P)
P
- Pandigital Fractions (27 P)
- Pea Patterns (8 P)
- Polydivisible Numbers (3 P)
- Prime Magic Squares (9 P)
Q
R
- Reverse-and-Add (4 P)
S
T
- Think of a Number Puzzles (8 P)
Z
Pages in category "Recreational Mathematics"
The following 96 pages are in this category, out of 96 total.
1
- 1 can be Expressed as Sum of 4 Distinct Unit Fractions in 6 Ways
- 100 using Four 9s
- 12 Knights to Attack or Occupy All Squares on Chessboard
- 123456789 x 8 + 9 = 987654321
- 123456789 x 9 + 10 = 1111111111
- 17 Consecutive Integers each with Common Factor with Product of other 16
- 1782 is 3 Times Sum of all 2-Digit Numbers from its Digits
2
A
C
D
I
L
- Largest Integer whose Digits taken in Pairs all form Distinct Primes
- Largest n such that 1 to n can be Partitioned for no Element to be Sum of 2 Elements in Same Set
- Largest nth Power which has n Digits
- Largest Product of Pandigital Factors
- Length of God's Algorithm for Sam Loyd's Fifteen Puzzle
- Letters of Names of Numbers in Alphabetical Order
- Lightning Calculation by 9-Digit Number
N
- Non-Palindromes in Base 2 by Reverse-and-Add Process
- Number of Convex Polygons from Complete Set of Hexiamonds
- Number of Ways to Tile Standard Chessboard with Dominoes
- Number whose Square and Cube use all Digits Once
- Numbers equal to Sum of Squares of two Parts
- Numbers that cannot be made Prime by changing 1 Digit
- Numbers which are Sum of Increasing Powers of Digits
- Numbers which Multiplied by 2 are the Reverse of when Added to 2
- Numbers whose Product with Reverse are Equal
- Numbers whose Product with Reverse are Equal/Historical Note
- Numbers whose Squares are Consecutive Odd or Even Integers Juxtaposed
- Numbers whose Squares have Digits which form Consecutive Decreasing Integers
- Numbers whose Squares have Digits which form Consecutive Increasing Integers
- Numbers whose Squares have Digits which form Consecutive Integers
P
- Palindromes Formed by Multiplying by 55
- Pandigital Square Equation
- Pandigital Sum whose Components are Multiples
- Prime Factors of One More than Power of 10
- Primorials which are Product of Consecutive Integers
- Products of 2-Digit Pairs which Reversed reveal Same Product
- Products of Repdigit Numbers
- Properties of 12,345,679
- Properties of 5,559,060,566,555,523
- Properties of Family of 333,667 and Related Numbers
- Properties of Family of 333,667 and Related Numbers/Product with Certain Repetitive Numbers
- Properties of Family of 333,667 and Related Numbers/Squares
R
S
- Sequence of 5 Consecutive Non-Primable Numbers by Changing 1 Digit
- Sequence of Numbers Divisible by Sequence of Primes
- Sequence of Squares Beginning and Ending with n 4s
- Sequence of Sum of Squares of Digits
- Set of 5 Triplets whose Sums and Products are Equal
- Smallest Integer using Three Words in English Description
- Smallest Integer which is Product of 4 Triples all with Same Sum
- Smallest Multiple of 9 with all Digits Even
- Smallest Number which is Multiplied by 99 by Appending 1 to Each End
- Smallest Perfect Square Dissection
- Square of Reversal of Small-Digit Number
- Square of Small-Digit Palindromic Number is Palindromic
- Squares Ending in 5 Occurrences of 2-Digit Pattern
- Squares Ending in n Occurrences of m-Digit Pattern
- Squares Ending in n Occurrences of m-Digit Pattern/Example
- Squares of 23...3
- Squares of 3...34
- Squares of 3...34/Historical Note
- Squares whose Digits can be Separated into 2 other Squares
- Squares whose Digits form Consecutive Decreasing Integers
- Squares whose Digits form Consecutive Increasing Integers
- Squares whose Digits form Consecutive Integers
- Squares with No More than 2 Distinct Digits
- Sum of 3 Unit Fractions that equals 1
- Sum of 4 Unit Fractions that equals 1
- Sum of 5 Unit Fractions that equals 1
- Sum of 6 Unit Fractions that equals 1