Complete the pattern: 3, 6, 9, 12, ......

Options

A. 15
B. 18
C. 21
D. 24

Answer

To complete the pattern: 3, 6, 9, 12, we can observe the sequence and identify the rule that generates these numbers.

### Step-by-Step Solution:

1. **Identify the Pattern**:
- The numbers given are: 3, 6, 9, 12.
- We can see that each number is increasing by the same amount.

2. **Calculate the Difference**:
- Let's find the difference between consecutive numbers:
- 6 - 3 = 3
- 9 - 6 = 3
- 12 - 9 = 3
- The difference is consistently 3.

3. **Continue the Pattern**:
- Since the difference is 3, we can find the next number by adding 3 to the last number in the sequence:
- 12 + 3 = 15

4. **Write the Complete Pattern**:
- Now we can write the complete pattern including the next number:
- 3, 6, 9, 12, 15

### Final Answer:
The completed pattern is: **3, 6, 9, 12, 15**.