You may also like

Exploring Wild & Wonderful Number Patterns

EWWNP means Exploring Wild and Wonderful Number Patterns Created by Yourself! Investigate what happens if we create number patterns using some simple rules.

Sending Cards

This challenge asks you to investigate the total number of cards that would be sent if four children send one to all three others. How many would be sent if there were five children? Six?

Dice and Spinner Numbers

If you had any number of ordinary dice, what are the possible ways of making their totals 6? What would the product of the dice be each time?

Sam's Quick Sum

Age 7 to 11
Challenge Level

Why do this problem?

This problem is a good context in which to discuss different, and perhaps most efficient, methods of calculation.

Key questions

Why don't you try adding all the one-digit numbers first?
Can you describe what you did?
Are there any quicker ways of doing it?

Possible support

Learners could find the sum of the one-digit whole numbers first and then the two-digit whole numbers instead.