These lower primary tasks all specifically draw on the use of visualising. Ten cards are put into five envelopes so that there are two cards in each envelope. Can you fill in this table square? Norrie sees two lights flash at the same time, then one of them flashes every 4th second, and the other flashes every 5th second. Can you work out how long it is between each super-eclipse? Can you place the blocks so that you see the reflection in the picture? Bracelets Age 7 to 11 Challenge Level:

A game for two people, or play online. Four Go Age 7 to 11 Challenge Level: Counting Cogs Age 7 to 14 Challenge Level: Working Systematically at KS2. Buying a Balloon Age 7 to 11 Challenge Level:

Here are some useful problem-solving skills:. Make 37 Age 7 to 14 Challenge Level: Shape Age 7 to 11 Challenge Level: Tasks for KS2 children which focus on working systematically. Four Go Age 7 to 11 Challenge Level: Can you make square numbers by adding two prime numbers together?

Ordering Cards Age 5 to 11 Challenge Level: Prison Cells Age 7 to 11 Challenge Level: Olympic Turns Age 7 to 11 Challenge Level: Division Rules Age 7 to 11 Challenge Level: Age 7 to 11 Challenge Level: Place four pebbles on the sand in the form of a square. How many extra pebbles are added each time?

The lower primary tasks in this collection could each be solved by working backwards. Quadrilaterals Age 7 to 11 Challenge Level: Four Go Age 7 to 11 Challenge Level: Can you use the information to prob,em out which cards I have used? Norrie sees two lights flash at the same time, then one of them flashes every 4th second, and the other flashes every 5th second.

Age 7 to 11 Working Backwards at KS2 The upper primary tasks in this collection could each be solved by working backwards. What number of smaller equilateral triangles is it NOT possible to dissect a larger equilateral triangle into? Players take it in turns to choose a dot on the grid.

Scroll down to see groups of tasks from the site which will give learners experience of specific skills. How about the shaded numbers in the other squares?

## Using NRICH Tasks to Develop Key Problem-solving Skills

How many cubes of each colour have we used? Sealed Solution Age 7 to 11 Challenge Level: Age 7 to 14 Challenge Level: How about if I had five buttons?

Counting Cogs Age 7 to 14 Challenge Level: Can you work out how long it is between each super-eclipse? A game for two people, or play online.

# Problem-solving Skills :

Multiples Grid Age 7 to 11 Challenge Level: They are each holding a card with a number on it. Investigate the different numbers of people and rats there could have been if you know how many legs there are altogether!

What do we mean by ‘problem-solving skills’? Can you describe the journey to each of the six places on these maps? We start with one yellow cube and build around it to make a 3x3x3 cube with red cubes.