Crosses can be drawn on number grids of various sizes. What do you notice when you add opposite ends?
25 of the storeys of a 50 storey building are painted gold, and the rest are painted black…
The sum of five consecutive integers is equal to the sum of the next three consecutive integers. Can you find the largest of these integers?
How old will Julie be when her age is equal to the sum of her daughters’ ages?
Surprising numerical patterns can be explained using algebra and diagrams…
Think of two whole numbers under 10, and follow the steps. I can work out both your numbers very quickly. How?
The Number Jumbler can always work out your chosen symbol. Can you work out how?
These are the results when 3 numbers were added in pairs. What were the numbers?
Three numbers add up to 100. The difference between the larger two is 12 and the difference between the smaller two is 2. What are the numbers?
The answer is 5x+8y… What was the question?
Amy misread a question and got an incorrect answer. What should the answer have be?
Pick a square within a multiplication square and add the numbers on each diagonal. What do you notice?