2 out of 3
Take three consecutive numbers and add them together. What do you notice?
3 out of 3
We start with one yellow cube and build around it to make a 3×3×3 cube with red cubes. Then we build around that red cube with blue cubes and so on. How many cubes of each colour have we used?
1 out of 3
Can you use the clues to complete these 5 by 5 Mathematical Sudokus?
3 out of 3
How many solutions can you find to this sum? Each of the different letters stands for a different number.
1 out of 3
A cinema has 100 seats. How can ticket sales make £100 for these different combinations of ticket prices?
1 out of 3
Can you arrange these numbers into 7 subsets, each of three numbers, so that when the numbers in each are added together, they make seven consecutive numbers?
1 out of 3
Crosses can be drawn on number grids of various sizes. What do you notice when you add opposite ends?
1 out of 3
How many ways can you find to put in operation signs (+, −, ×, ÷) to make 100?
1 out of 3
Try entering different sets of numbers in the number pyramids. How does the total at the top change?
1 out of 3
15 = 7 + 8 and 10 = 1 + 2 + 3 + 4. Can you say which numbers can be expressed as the sum of two or more consecutive integers?
