Write the successors and predecessors of:
`400`

Options

A. `401`; `399`
B. `400`; `399`
C. `400`; `398`
D. `401`; `389`

Answer

To find the successor and predecessor of the number 400, we can follow these steps:

### Step 1: Understand the terms
- **Successor**: The number that comes immediately after a given number.
- **Predecessor**: The number that comes immediately before a given number.

### Step 2: Find the successor of 400
To find the successor of 400, we add 1 to it:
\[ \text{Successor of } 400 = 400 + 1 = 401 \]

### Step 3: Find the predecessor of 400
To find the predecessor of 400, we subtract 1 from it:
\[ \text{Predecessor of } 400 = 400 - 1 = 399 \]

### Final Answer:
- Successor of 400 is **401**.
- Predecessor of 400 is **399**.

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