40
20,2
10,2,2
5,2,2,2
Factor tree of 40: 40 20,2 10,2,2 5,2,2,2
All I did was make a factor tree. The GCF (Greatest Common Factor) is 5. :)
40 20,2 10,2,2 5,2,2,2
40 20,2 10,2,2 5,2,2,2
40 20,2 10,2,2 5,2,2,2
40 20,2 10,2,2 5,2,2,2
It's 35
40 20,2 10,2,2 5,2,2,2
Keep dividing by two. 32 16,2 8,2,2 4,2,2,2 2,2,2,2,2 40 20,2 10,2,2 5,2,2,2
40 20,2 10,2,2 5,2,2,2
40 20,2 10,2,2 5,2,2,2
Two factors of 40 are 20 and 2. There are no more factors of 2, but factors of 20 include 5 and 4. There are no more factors of 5 but 4 factors of 4 include 2 and 2. So, the factors of 40 are 2, 5, 2, 2 This simplifies to make 2^3 * 5 Hope that helped :)