3 out of 3
Have a go at this 3D extension to the Pebbles problem.
3 out of 3
3 out of 3
Polygonal numbers are those that are arranged in shapes as they enlarge. Explore the polygonal numbers drawn here.
1 out of 3
Can you find examples of magic crosses? Can you find all the possibilities?
3 out of 3
It starts quite simple but great opportunities for number discoveries and patterns!
1 out of 3
Weekly Problem 38 - 2009
This sequence is given by the mean of the previous two terms. What is the fifth term in the sequence?
1 out of 3
How many squares are needed to continue this pattern?
1 out of 3
MatildaMatildaMatil... What is the 1000th letter?
2 out of 3
What is the last digit of the number 1 / 5^903 ?
2 out of 3
Choose a couple of the sequences. Try to picture how to make the next, and the next, and the next... Can you describe your reasoning?
