Keep adding as few pebbles as necessary to double the area. Can you find the smallest number that lights up all four lights? Can you replace the letters with numbers? Every day it doubled its height. Multiply Multiples 1 Age 7 to 11 Challenge Level: Are there some numbers that are good to aim for? Number Detective Age 5 to 11 Challenge Level:
What’s in the Box? Multiply Multiples 1 Age 7 to 11 Challenge Level: When is the answer a whole number? Difficulties with Division Age 5 to 11 This article for teachers looks at how teachers can use problems from the NRICH site to help them teach division. Using the information given, can you replace the stars in the calculation with figures? Check Codes Age 14 to 16 Challenge Level: Buying a Balloon Age 7 to 11 Challenge Level:
Will you be the first to reach the target? Three Dice Age 7 to 11 Challenge Level: I’m thinking of a number.
Can you find a pair of numbers that has four odds between them? Big Powers Age 11 to 16 Challenge Level: Dirisibly Yours Age 16 to 18 Challenge Level: 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 happens when you add pairs of the numbers dviision
You have worked out a secret code with a friend. Can you match the cards?
Display Boards Age 7 to 11 Challenge Level: Growing Garlic Age 5 to 7 Challenge Level: Doubling Fives live Age 5 to 7 Challenge Level: These practical challenges are all about making a ‘tray’ and covering it with kks2. A game for 2 people. Can you get close to than your partner?
It’s Sahila’s birthday and she is having a party. Can you find different ways of doing it?
Division Rules :
After this they all had the same number of counters. You djvision put more than one weight on a hook. Make 37 Age 7 to 14 Challenge Level: How many possible necklaces can you find? Can you make sense of them? These sixteen children are standing in four lines of four, one behind the other.
Now add your two numbers. Difficulties with Division Age 5 to 11 This article for teachers looks at how teachers can use problems from the NRICH site to help them teach division. A knowledge of modular arithmetic is useful. This challenge encourages you to explore dividing a three-digit number by a single-digit number.
Numbers and the Number System :: Divisibility :
This article looks at how images, concrete apparatus and representations can help students develop deeper understandings of abstract mathematical ideas. Strike it Out game for an adult and child.
Differences Age 11 to 14 Challenge Level: We start with one yellow cube and build around it to make a 3x3x3 cube with red cubes. Which pairs do not let this happen? These activities focus on finding all possible solutions so working in a systematic way will ensure none are left out. Can you spot any patterns? Curious Number Age 7 to 11 Challenge Level: