# Resources tagged with: Odd and even numbers

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There are 16 NRICH Mathematical resources connected to Odd and even numbers, you may find related items under Properties of Numbers.

Broad Topics > Properties of Numbers > Odd and even numbers

### More Carroll Diagrams

##### Age 7 to 14 Challenge Level:

How have the numbers been placed in this Carroll diagram? Which labels would you put on each row and column?

### Exploring Simple Mappings

##### Age 11 to 14 Challenge Level:

Explore the relationship between simple linear functions and their graphs.

### Odds and Evens

##### Age 11 to 14 Challenge Level:

Are these games fair? How can you tell?

### Picturing Square Numbers

##### Age 11 to 14 Challenge Level:

Square numbers can be represented as the sum of consecutive odd numbers. What is the sum of 1 + 3 + ..... + 149 + 151 + 153?

### Make 37

##### Age 7 to 14 Challenge Level:

Four bags contain a large number of 1s, 3s, 5s and 7s. Pick any ten numbers from the bags above so that their total is 37.

##### Age 7 to 14 Challenge Level:

I added together some of my neighbours' house numbers. Can you explain the patterns I noticed?

### Magic Crosses

##### Age 7 to 14 Challenge Level:

Can you find examples of magic crosses? Can you find all the possibilities?

### Magic Letters

##### Age 11 to 14 Challenge Level:

Charlie has made a Magic V. Can you use his example to make some more? And how about Magic Ls, Ns and Ws?

### Odds, Evens and More Evens

##### Age 11 to 14 Challenge Level:

Alison, Bernard and Charlie have been exploring sequences of odd and even numbers, which raise some intriguing questions...

### Impossible Sandwiches

##### Age 11 to 18

In this 7-sandwich: 7 1 3 1 6 4 3 5 7 2 4 6 2 5 there are 7 numbers between the 7s, 6 between the 6s etc. The article shows which values of n can make n-sandwiches and which cannot.

##### Age 14 to 16 Challenge Level:

Follow-up to the February Game Rules of FEMTO.

### FEMTO

##### Age 14 to 16 Challenge Level:

A new card game for two players.

### Prime Magic

##### Age 7 to 16 Challenge Level:

Place the numbers 1, 2, 3,..., 9 one on each square of a 3 by 3 grid so that all the rows and columns add up to a prime number. How many different solutions can you find?