Plus Minus Age 14 to 16 Challenge Level: Subtraction Surprise Age 7 to 14 Challenge Level: Or you can download and print off this scoring sheet. Digit Addition live Age 5 to 11 Challenge Level: Trebling Age 7 to 11 Challenge Level: Powers of numbers behave in surprising ways.

What rule might he have chosen? One of Thirty-six Age 5 to 7 Challenge Level: What different shapes do they make if each part lies in the small squares of a 4 by 4 square? All the Digits Age 7 to 11 Challenge Level: You may also like Chocolate There are three tables in a room with blocks of chocolate on each. Number problems at primary level that require careful consideration. Number Differences Age 7 to 11 Challenge Level:

Are you surprised by the results?

Can you see how these factor-multiple chains work? Sorting the Numbers Age 5 to 11 Challenge Level: Song Prooblem Age 7 to 11 Challenge Level: Move the first digit to the end and move the rest along. Investigate the total number of sweets received by people sitting in different positions.

Powers of numbers behave in surprising ways. The winner is the one closer to the target.

## Nice or Nasty

Take a look at the video of this trick. All the Digits Age 7 to 11 Challenge Level: Can you complete this jigsaw of the multiplication square?

Can problme replace the letters with numbers? Register for our mailing list. Watch our videos of multiplication methods that you may not have met before. She stopped for a rest after writing seventeen digits.

# Nice or Nasty :

Cut four triangles from a square as shown in the picture. Can you make sense of them? Greater Than or Less Than? Move the first digit to the end and move the rest along.

Largest Even Age 5 to 7 Challenge Level: Dicey Operations Age 11 to 14 Challenge Level: One to Fifteen Age 7 to 11 Challenge Level: These short problems can be used to test your students’ understanding of place value. Why is this maths and not magic?

# Place Value KS1 :

Age 7 to 11 Challenge Level: Age 11 to 14 Challenge Level: Number problems for inquiring kw2 learners. Age 5 to 7 Challenge Level: Use your knowledge of place value to beat your opponent. How many different squares can you make altogether?

Some children have been doing different tasks.

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. This time you can choose to keep your number and put it in one of your cells, OR give it to your partner and tell them which cell to put it in.

These caterpillars have nrjch parts. Reach Age 7 to 14 Challenge Level: