Reasoning
In our view, you can't do maths without reasoning! Why not have a go at these activities which will give you chances to reason in different ways? Can you explain your solution and convince someone else it is correct?
Largest Even Age 5 to 7 Challenge Level:
How would you create the largest possible two-digit even number from the digit I've given you and one of your choice?
Two Numbers Under the Microscope Age 5 to 7 Challenge Level:
This investigates one particular property of number by looking closely at an example of adding two odd numbers together.
Eggs in Baskets Age 5 to 7 Challenge Level:
There are three baskets, a brown one, a red one and a pink one, holding a total of 10 eggs. How many eggs are in each basket?
Hundred Square Age 5 to 7 Challenge Level:
A hundred square has been printed on both sides of a piece of paper. What is on the back of 100? 58? 23? 19?
That Number Square! Age 5 to 11 Challenge Level:
Exploring the structure of a number square: how quickly can you put the number tiles in the right place on the grid?
Poly Plug Rectangles Age 5 to 14 Challenge Level:
The computer has made a rectangle and will tell you the number of spots it uses in total. Can you find out where the rectangle is?
Copyright © 1997 - 2020. University of Cambridge. All rights reserved.
NRICH is part of the family of activities in the Millennium Mathematics Project.
NRICH is part of the family of activities in the Millennium Mathematics Project.