2 out of 3
Use cubes to continue making the numbers from 7 to 20. Are they sticks, rectangles or squares?
1 out of 3
This activity creates an opportunity to explore all kinds of number-related patterns.
1 out of 3
These two group activities use mathematical reasoning - one is numerical, one geometric.
1 out of 3
1 out of 3
Take the number 6 469 693 230 and divide it by the first ten prime numbers and you'll find the most beautiful, most magic of all numbers. What is it?
3 out of 3
Using all ten cards from 0 to 9, rearrange them to make five prime numbers. Can you find any other ways of doing it?
1 out of 3
Factors and Multiples game for an adult and child. How can you make sure you win this game?
1 out of 3
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 its first or its last digit. Find all strange numbers.
1 out of 3
Which of the numbers shown is the product of exactly 3 distinct prime factors?
1 out of 3
Weekly Problem 24 - 2006
How many of the rearrangements of the digits 1, 3 and 5 give prime numbers?
