Who said that adding couldn't be fun?
What happens when you add three numbers together? Will your answer be odd or even? How do you know?
Look at three 'next door neighbours' amongst the counting numbers. Add them together. What do you notice?
Choose four different digits from 1-9 and put one in each box so that the resulting four two-digit numbers add to a total of 100.
This challenge combines addition, multiplication, perseverance and even proof.
Ten cards are put into five envelopes so that there are two cards in each envelope. The sum of the numbers inside it is written on each envelope. What numbers could be inside the envelopes?
This task combines spatial awareness with addition and multiplication.
Look at what happens when you take a number, square it and subtract your answer. What kind of number do you get? Can you prove it?
This dice train has been made using specific rules. How many different trains can you make?
Arrange the four number cards on the grid, according to the rules, to make a diagonal, vertical or horizontal line.
Four bags contain a large number of 1s, 3s, 5s and 7s. Pick any ten numbers from the bags above so that their total is 37.