November 2009, Stage 1&2

This month many of our problems focus on properties of number and calculating. 'Playing' with the mathematics of a situation is often a good way to get into a problem and several resources this month lend themselves to that approach.

Problems

So It's 28

Stage: 1 Challenge Level:

Here is your chance to investigate the number 28 using shapes, cubes ... in fact anything at all.

Stone Age Counting

Stage: 1 Challenge Level:

What could these drawings, found in a cave in Spain, represent?

Mrs Trimmer's String

Stage: 1 Challenge Level:

Can you help the children in Mrs Trimmer's class make different shapes out of a loop of string?

28 and It's Upward and Onward

Stage: 2 Challenge Level:

Can you find ways of joining cubes together so that 28 faces are visible?

Tables Without Tens

Stage: 2 Challenge Level:

Investigate and explain the patterns that you see from recording just the units digits of numbers in the times tables.

Which Symbol?

Stage: 2 Challenge Level:

Choose a symbol to put into the number sentence.

Neighbours

Stage: 2 Challenge Level:

In a square in which the houses are evenly spaced, numbers 3 and 10 are opposite each other. What is the smallest and what is the largest possible number of houses in the square?

Sets of Four Numbers

Stage: 2 Challenge Level:

There are ten children in Becky's group. Can you find a set of numbers for each of them? Are there any other sets?

Featured Solution

Hundred Square

You found many different ways of finding the number on the reverse of the hundred square.

Go to last month's problems to see more solutions.

Articles & Games

Assessing Pupil Progress (APP) and NRICH Resources

In this article Jenny talks about Assessing Pupils' Progress and the use of NRICH problems.

Shifting Times Tables Game

In this activity, the computer chooses a times table and shifts it. Can you work out the table and the shift each time?