430, 180, 380, 220, 350, 230, 340

Options

A. 430
B. 230
C. 380
D. 340

Explanation

To find the odd one out in the series: 430, 180, 380, 220, 350, 230, 340, we will analyze the pattern of the numbers step by step.

### Step 1: Identify the Pattern
We will look for a pattern in the series by examining the differences between the numbers in alternating positions.

### Step 2: Analyze the First Set of Numbers
- Start with the first number: 430
- The second number is 380.
- The difference is:
\[ 430 - 380 = 50 \]

### Step 3: Analyze the Second Set of Numbers
- The first number in the second set is 180.
- The second number is 220.
- The difference is:
\[ 220 - 180 = 40 \]

### Step 4: Continue with the First Set
- The next number in the first set is 350.
- The difference from the previous number (380) is:
\[ 380 - 350 = 30 \]

### Step 5: Continue with the Second Set
- The next number in the second set is 230.
- The difference from the previous number (220) is:
\[ 230 - 220 = 10 \]

### Step 6: Analyze the Last Number
- The last number in the first set is 340.
- The difference from the previous number (350) is:
\[ 350 - 340 = 10 \]

### Step 7: Summarize the Differences
Now we have the following differences:
- From 430 to 380: -50
- From 180 to 220: +40
- From 380 to 350: -30
- From 220 to 230: +10
- From 350 to 340: -10

### Step 8: Identify the Odd Number
Now, let's check if the differences follow a consistent pattern:
1. The first difference is -50
2. The second difference is +40
3. The third difference is -30
4. The fourth difference is +10
5. The fifth difference is -10

The pattern alternates between decreasing and increasing, but the second number in the second set (230) does not fit the pattern. The expected number after 220, following the pattern of increasing by 20, should be 240 instead of 230.

### Conclusion
Thus, the odd one out in the series is **230**. The correct number should be **240**.

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