How about when a friend begins a new rhythm at the same time? Can you sort out the clues and find the number? Can you put these mixed-up times in order? Consecutive Numbers Age 7 to 14 Challenge Level: Looking at the Olympic Medal table, can you see how the data is organised? Use the information to find out what the three numbers were.

Finding All Possibilities Upper Primary These activities focus on finding all possible solutions so working in a systematic way will ensure none are left out. This activity is based on data in the book ‘If the World Were a Village’. Play to 37 Age 7 to 11 Challenge Level: Choose four different digits from and put one in each box so that the resulting four two-digit numbers add to a total of This feature draws together tasks which give learners opportunities to reason for different purposes. How many ways can you find to do up all four buttons on my coat? Can you put the numbers 1 to 8 into the circles so that the four calculations are correct?

Can you find all the ways to get 15 at the top of this triangle of numbers?

Reach Age 7 to 14 Challenge Level: Arrange the four number cards on the grid, according to the rules, yy3 make a diagonal, vertical or horizontal line. Highest and Lowest Age 7 to 11 Challenge Level: What do you think is happening to the numbers?

## Handling Data KS2

Every card he revealed had the same value as the one he had just finished spelling. Play this game and see if you can figure out the computer’s chosen number.

The planet of Vuvv has seven moons. Can you get four in a row? Try out some calculations.

# Handling Data KS2 :

An investigation involving adding and subtracting sets of consecutive numbers. Sweets are given out to party-goers in a particular way.

What’s in the Box? Three Dice Age 7 to 11 Challenge Level: Are these statements always true, sometimes true or never true? Follow the Numbers Age 7 to ndich Challenge Level: Cycling Squares Age 7 to 11 Challenge Level: Think of a number, square it and subtract your starting number.

This task combines spatial awareness with addition and multiplication. How many different triangles can you make on a circular pegboard that has nine pegs?

Nine-pin Triangles Age 7 to 11 Challenge Level: The tasks in this collection encourage children to create, recognise, extend and explain number patterns. Choose two of the numbers to multiply or divide, then mark your answer on the number line. How did this work? The winner is the first to make the total Two Clocks Age 7 to 11 Challenge Level: How does it compare with children in your class?

Age 7 to 11 Challenge Level: Can you replace the letters with numbers? To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice.

Factor track is not a race but a game of skill.

In how many different ways can you do it? This challenge combines addition, multiplication, perseverance and even proof. Here’s a strategy game with lots to explore.

Investigate the sum of the numbers on the top and bottom faces of a line of three dice. They are each holding a card with a number on it. How Big Are Classes 5, 6 and 7?