The problem
Click to see the original problem
why is it 2^2-1
Answer provided by our tutors
It is because 4 = 2*2 and 10 = 2*5, that is:
why is it 2^2-1
It is because 4 = 2*2 and 10 = 2*5, that is:
| ← Previous Problem | Next Problem → |