### PROBLEM SOLVING KS2 NRICH

The idea of this game is to add or subtract the two numbers on the dice and cover the result on the grid, trying to get a line of three. Norrie sees two lights flash at the same time, then one of them flashes every 4th second, and the other flashes every 5th second. Abundant Numbers Age 7 to 11 Challenge Level: Make 37 Age 7 to 14 Challenge Level: Age 7 to 11 Challenge Level:

Can you fill in this table square? What happens when you enter different numbers? Counting Cards Age 7 to 11 Challenge Level: Mystery Matrix Age 7 to 11 Challenge Level: How many different shaped boxes can you design for 36 sweets in one layer? Age 7 to 11 Reasoning and Convincing at KS2 The tasks in this collection can be used to encourage children to convince others of their reasoning, by first convincing themselves, then a friend, then a ‘sceptic’.

Tasks for KS2 children which focus on working systematically.

The great planetary explorer Nico counted 52 legs. The tasks in this collection can be used to encourage children to convince others of their reasoning, using ‘because’ statements. Square Subtraction Age 7 to 11 Challenge Level: Try out some calculations.

## Problem Solving

What can you say about these nrihc Four Go Age 7 to 11 Challenge Level: Cubes Age 7 to 11 Challenge Level: The clever prison warder arranged them so there were 25 along each wall of the prison block. These upper primary tasks all specifically draw on the use of visualising.

How did this rnich There is a clock-face where the numbers have become all mixed up. Multiples Probleem Age 7 to 11 Challenge Level: This article, written for primary teachers, discusses what we mean by ‘problem-solving skills’ and draws attention to NRICH tasks which can help develop specific skills. Use these four dominoes to make a square that has the same number of dots on each side. Which is quicker, counting up to 30 in ones or counting up to in tens?

# Multiplication and Division KS2 :

Tea Cups Age 7 to 14 Challenge Level: Reach Age 7 to 14 Challenge Level: Can you work out how long it is between each super-eclipse? How hrich this work? The planet of Vuvv has seven moons. He could then pay any sum of money from 1p to 15p without opening any bag. Can you find the smallest number that lights up all four lights?

# Addition and Subtraction KS2 :

This task combines spatial awareness with addition and multiplication. Can you find any two-digit numbers that satisfy all of these statements?

Factors and Multiples KS2. How can you arrange the 5 cubes so that you need the smallest number of Brush Loads of paint to cover them? Lolla bought a balloon at the circus.

Investigate the sum of the numbers on the top and bottom faces of a line of three dice. Look at different ways of dividing things.

Design an arrangement ke2 display boards in the school hall which fits the requirements of different people. Register for our mailing list. Can you make square numbers by adding two prime numbers together?

She gave the clown six coins to pay for it. Nice or Nasty Age 7 to 14 Challenge Level: We start with one yellow cube and build around it to make a 3x3x3 cube silving red cubes.