Subject area
Maths
Today's maths investigation is to find which numbers from 1 - 40 are abundant numbers.
To find the factors of a number, you have to find all the pairs of numbers that multiply together to give that number.
The factors of 48 are:
1 and 48
2 and 24
3 and 16
4 and 12
6 and 8
If we leave out the number we started with, 48, and add all the other factors, we get 76:
1+2+3+4+6+8+12+16+24=76
So .... 48 is called an abundant number because it is less than the sum of its factors (without itself). (48 is less than 76.)
Remember to work systematically and to record your working clearly.
Activity type