Excel Investigation: Sums of Consecutive Numbers

Stage: 3 and 4 Challenge Level: Challenge Level:2 Challenge Level:2

Download the Excel file .

Groups of numbers like 7, 8, 9, are called consecutive numbers, they follow directly on, one from another.

We are going to explore which numbers can be made by adding up consecutive numbers.

7 + 8 + 9 = 24 So 24 can be made from consecutive numbers.

Is there more than one way to make 24?

25 for example can be made by 12 + 13 or by 3 + 4 + 5 + 6 + 7.

The link below provides student worksheets, as a Word file, for the basic task and for the formula for the sum of consecutive numbers:

Sum of Consecutive numbers.doc