Algorithms

There are 32 NRICH Mathematical resources connected to Algorithms

problem

Skeleton

Age

11 to 14

Challenge level

Amazing as it may seem the three fives remaining in the following `skeleton' are sufficient to reconstruct the entire long division sum.

problem

Sorted

Age

14 to 18

Challenge level

How can you quickly sort a suit of cards in order from Ace to King?

problem

Probably a code?

Age

16 to 18

Challenge level

Is the regularity shown in this encoded message noise or structure?

problem

A fine thing?

Age

16 to 18

Challenge level

Second challenge cipher

problem

Jluuis or even Asutguus?

Age

16 to 18

Challenge level

Sixth challenge cipher

problem

Stage 5 Cipher Challenge

Age

16 to 18

Challenge level

Can you crack these very difficult challenge ciphers? How might you systematise the cracking of unknown ciphers?

problem

ip?

Age

16 to 18

Challenge level

Seventh challenge cipher

problem

Up a semitone?

Age

16 to 18

Challenge level

Fifth challenge cipher

problem

Semicircle

Age

16 to 18

Challenge level

Fourth challenge cipher

problem

Vital?

Age

16 to 18

Challenge level

Third challenge cipher

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For younger learners

Algorithms

Skeleton

Sorted

Probably a code?

A fine thing?

Jluuis or even Asutguus?

Stage 5 Cipher Challenge

ip?

Up a semitone?

Semicircle

Vital?