| A | B |
| Borrow 5 bits. How many subnets? | 32 |
| Borrow 3 bits. How many subnets? | 8 |
| Borrow 2 bits. How many subnets? | 4 |
| Borrow 1 bit. How many subnets? | 2 |
| Borrow 4 bits. How many subnets? | 16 |
| Borrow 6 bits. How many subnets? | 64 |
| Borrow 7 bits. How many subnets? | 128 |
| 128 subnets. How many bits were borrowed? | 7 |
| 64 subnets. How many bits were borrowed? | 6 |
| 16 subnets. How many bits were borrowed? | 4 |
| 2 subnets. How many bits were borrowed. | 1 |
| 4 subnets. How many bits were borrowed? | 2 |
| 8 subnets. How many bits were borrowed? | 8 |
| 32 subnets. How many bits were borrowed? | 5 |