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Easy Sequences 27: Product of Radicals of Integers
The radical of a positive integer is defined as the product of the distinct prime numbers dividing . For example, the distinct ...

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Easy Sequences 28: Sum of Radicals of Integers
The radical of a positive integer is defined as the product of the distinct prime numbers dividing . For example, the distinct ...

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Easy Sequences 31: N-N's Sequence
We define the N-N's Sequence, as the series of all positive integers in ascending order and with repetition, wherein any number ...

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Easy Sequences 25: Product of Series
The function 'P(n)' is defined as the series product: where 'T(n)' is the triangular sum: ...

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Easy Sequences 21: Combinatorial Summations
Create the function S(n), defined by the following summation: The symbol is the combination f...

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Easy Sequences 18: Set Bits of Triple Summations
The function S(n) is defined by the following triple summations: The double brackets mean that th...

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Easy Sequences 16: Volume of Embedded Octahedron
An octahedron (not regular) is formed by joining the centers of the faces of a rectangular parallelepiped (see below figure). ...

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Easy Sequences 13: Average Speed of Spaceship
A certain alien spaceship is capable of traveling at extremely high velocities and is able to change speed instantaneously. The ...

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Characterize the final state of another digit inventory sequence

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Compute the nth term from the golden sieve

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Compute the nth term from the Sieve of Flavius Josephus

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Compute expulsions from the Kimberling shuffle

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Compute a row of the Kimberling shuffle

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Compute the largest number possible with the Brussels choice

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Redefine the Array if the Elements in the Array are Repeating
Check if the Array has any repeating elements, if there are repeating elements then choose "n" as a number of times you want tha...

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Acid-Base Chemistry: Which side of the reaction is more favorable?
In an Acid-Base reaction, there is always going to be an acid, a base, a conjugate acid, and a conjugate base. When provided wit...

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Construct the Seidel-Entringer-Arnold triangle
Several problems in Cody ask us to construct part or all of triangles in which entries follow a pattern. Cody Problems <https://...

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Identify eban numbers

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Deduce the pattern behind the sequence

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Cipher and Decipher the message - 3 key

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Decipher the message - same key for all digits
You will be given a input number (eg) x='gdkkn' you have to figure out the dechiper key and match it with given input and deci...

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Cipher or decipher the number according to the second input - 10 keys

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Cipher or Decipher the number according to the second input - 3 keys - order [1 2 3 2 1 2 3 ......]

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Cipher or Decipher the number according to the second input - 3 keys

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Cipher or Decipher the number according to the second input - 1 key for all digits

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Decipher the number 4 - 3 keys - order [1 2 3 2 1 2 3 ......]

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Decipher the number 3 - 10 keys

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TRON strategy toggle
Detect whether your lightcycle is on same side of existing walls as opponents lightcycle. This function is useful in toggling a...

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Deduce Equations for Simplified Interstellar Doppler Effect ✨
R2-D2 and C-3PO are friends. R2-D2 boards a spacecraft bound to a galaxy far, far away, but is always in contact with C-3PO, als...

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Back to the future II
See test suite

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