# Resources tagged with: Odd and even numbers

### There are 14 results

Broad Topics >

Numbers and the Number System > Odd and even numbers

##### 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?

##### 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 11 to 14 Challenge Level:

Great Granddad is very proud of his telegram from the Queen
congratulating him on his hundredth birthday and he has friends who
are even older than he is... When was he born?

##### 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?

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

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

##### 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?

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

A new card game for two players.

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

Follow-up to the February Game Rules of FEMTO.

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

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

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

There are exactly 3 ways to add 4 odd numbers to get 10. Find all
the ways of adding 8 odd numbers to get 20. To be sure of getting
all the solutions you will need to be systematic. What about. . . .

##### 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:

Use algebra to reason why 16 and 32 are impossible to create as the
sum of consecutive numbers.

##### Age 7 to 14

Read all about Pythagoras' mathematical discoveries in this article written for students.

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

Are these games fair? How can you tell?