### NRICH PROBLEM SOLVING KS2

You could try for different numbers and different rules. Is problem solving at the heart of your curriculum? Reach Age 7 to 14 Challenge Level: Choose two of the numbers to multiply or divide, then mark your answer on the number line. Register for our mailing list. Can you find the smallest number that lights up all four lights?

How about when a friend begins a new rhythm at the same time? We start with one yellow cube and build around it to make a 3x3x3 cube with red cubes. Cubes Age 7 to 11 Challenge Level: Four bags contain a large number of 1s, 3s, 5s and 7s. How did he do it?

Play this game and see if you can figure out the computer’s chosen number. Sweets in a Box Age 7 to 11 Challenge Level: Tim had nine cards each with a different number from 1 to 9 on it.

Who said that adding couldn’t be fun? Are there some numbers that problrm good to aim for? How about if I had five buttons?

The planet of Vuvv has seven moons. Subtraction Surprise Age 7 to 14 Challenge Nrrich Can you discover its value in each problem? Journeys in Numberland Age 7 to 11 Challenge Level: Can you complete this jigsaw of the multiplication square?

# Addition and Subtraction KS2 :

How many blocks would be needed to build an up-and-down staircase with 5 steps up and 5 steps down? Can you work out some different ways to balance this equation? 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.

What numbers could be inside the envelopes? This task combines spatial awareness with addition and multiplication. Can you predict when you’ll be clapping and when you’ll be clicking if you start this rhythm?

She has 24 dominoes in her box and there are spots on them altogether. What happens if you join every second point on this circle?

## Multiplication and Division KS2

One quarter of these coins are heads but when I turn over two coins, one third are heads. You could try for different numbers and different rules. What Do You Need? Age 7 to 11 Challenge Level: Factor-multiple Chains Age 7 to 11 Challenge Level: Always, Sometimes or Never?

Age 5 to 7 Visualising at KS1 These lower primary tasks all specifically draw on the use of visualising.

Pick any ten numbers from the bags above so that their total is Finding Fifteen 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 Put operations signs between the numbers 3 4 5 6 to make the highest possible number and lowest possible number.

Dice in a Corner Age 7 to 11 Challenge Level: How many different ways can you do it? Investigate how the four L-shapes fit together to make an enlarged L-shape. Can you prove it? Mystery Matrix Age 7 to 11 Challenge Level: