# Resources tagged with: Prime numbers

### There are 11 results

Broad Topics >

Numbers and the Number System > Prime numbers

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

Follow this recipe for sieving numbers and see what interesting patterns emerge.

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

Can you find a relationship between the number of dots on the
circle and the number of steps that will ensure that all points are
hit?

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

All strange numbers are prime. Every one digit prime number is
strange and a number of two or more digits is strange if and only
if so are the two numbers obtained from it by omitting either. . . .

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

Make a line of green and a line of yellow rods so that the lines
differ in length by one (a white rod)

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

Using your knowledge of the properties of numbers, can you fill all the squares on the board?

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

Take any prime number greater than 3 , square it and subtract one.
Working on the building blocks will help you to explain what is
special about your results.

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

Arrange the four number cards on the grid, according to the rules, to make a diagonal, vertical or horizontal line.

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

Factors and Multiples game for an adult and child. How can you make sure you win this game?

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

A man has 5 coins in his pocket. Given the clues, can you work out
what the coins are?

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

A game in which players take it in turns to choose a number. Can you block your opponent?

##### Age 14 to 18

An introduction to proof by contradiction, a powerful method of mathematical proof.