What should be added to 51234, to make it divisible by 9?

Options

A. 6
B. 4
C. 3
D. 5

Answer

To determine what should be added to 51234 to make it divisible by 9, we can follow these steps:

### Step 1: Calculate the sum of the digits of 51234.
- The digits are: 5, 1, 2, 3, and 4.
- Sum = 5 + 1 + 2 + 3 + 4 = 15.

### Step 2: Find the remainder when the sum of the digits is divided by 9.
- Remainder = 15 mod 9 = 6 (since 15 = 9 * 1 + 6).

### Step 3: Determine what needs to be added to make the sum divisible by 9.
- To make the sum (15) divisible by 9, we need to add a number that will eliminate the remainder.
- Since the remainder is 6, we need to add (9 - 6) = 3.

### Step 4: Conclusion
- Therefore, we need to add 3 to 51234 to make it divisible by 9.

### Final Answer:
**3**

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