A game for two or more players that uses a knowledge of measuring tools. The lower primary tasks in this collection could each be solved by working backwards. Age 5 to 7 Working Backwards at KS1 The lower primary tasks in this collection could each be solved by working backwards. Swimmers Age 14 to 16 Challenge Level: Chippy’s Journeys Age 7 to 11 Challenge Level:

Four vehicles travel along a road one afternoon. Tasks for KS2 children which focus on working systematically. Age 7 to 11 Working Backwards at KS2 The upper primary tasks in this collection could each be solved by working backwards. Can you put the numbers in the V shape so that both ‘arms’ have the same total? Multiply Multiples 3 Age 7 to 11 Challenge Level:

This multiplication uses kx2 of the digits 0 – 9 once and once only. She arranged the cards into 6 unequal piles where each pile added to the same total. The numbers 1 – 9 may be used once and once only.

# Multiplication and Division KS2 :

During the third hour after midnight the hands on a clock point in the same direction so one hand is over the top of the other. Multiply Multiples 1 Age 7 to 11 Challenge Level: Age 5 to 11 Challenge Level: How many different routes are there? Use your addition and subtraction skills, combined with some strategic thinking, to beat your partner at this game.

Can you sort out the clues and find the number? We start with one yellow cube and build around it to make a 3x3x3 cube with red cubes. Can you prove it to be true for a rectangle or a hexagon?

## Area and Perimeter KS2

Can you rank these sets of quantities in order, from smallest to largest? Four on the Road Age 14 to 16 Challenge Level: In how many different ways can you do it? Subtraction Surprise Age 7 to 14 Challenge Level: Now and Then Age 7 to 11 Challenge Level: These clocks have been ka2 in a mirror. Can you order the digits from to make a number which is divisible by 3 so when the last digit is removed it becomes a 2-figure number divisible by 2, and so on?

Ten cards are put into five envelopes so that there are two cards in each envelope. This article, written for students, looks at how some measuring units and devices were developed. What kind of number do you get?

# Problem-solving Skills :

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. Age 7 to 11 Challenge Level: Buying a Balloon Age 7 to prblem Challenge Level: These eleven shapes each stand for a different number.

These pictures were made by starting with a square, finding the half-way point on each side and joining those points up. Make Age 7 to 11 Activiteis Level: Is there only one solution in each case?

## Working Systematically at KS2

Age 11 to 14 Challenge Level: What do they mean? This challenge is a game for two players.

Trebling Age 7 to 11 Challenge Level: The sum of the problrm inside it is written on each envelope. Flashing Lights Age 7 to 11 Challenge Level: Investigate the different numbers of people and rats there could have been if you know how many legs there are altogether!

Which pairs do not let this happen?