Identifying the Wrong Number in the Series

To find out the wrong number in the given series, we need to observe the pattern followed by the numbers. Let's analyze the given series step by step.

Step 1: Difference between consecutive numbers

The first step is to find the difference between consecutive numbers in the series. This will help us identify any pattern or rule followed by the numbers.

- The difference between 72.5 and 86 is 13.5
- The difference between 86 and 113 is 27
- The difference between 113 and 168 is 55
- The difference between 168 and 275 is 107
- The difference between 275 and 491 is 216
- The difference between 491 and 923 is 432

Step 2: Analyzing the differences

Now, let's analyze the differences obtained in step 1 to identify any pattern or rule followed by them.

- The differences between consecutive numbers are increasing gradually: 13.5, 27, 55, 107, 216, 432

Step 3: Finding the missing difference

Based on the pattern observed in step 2, we can assume that the next difference should be greater than 432. Let's calculate the difference between 923 and the next number in the series.

- The difference between 923 and the next number is 923 - 491 = 432

Step 4: Identifying the wrong number

Now, let's compare the calculated difference (432) with the actual difference between the last two numbers in the series (491 and 923). If the calculated difference matches the actual difference, then all the numbers in the series follow the same pattern. However, if the calculated difference does not match the actual difference, then the last number in the series is the wrong number.

- The calculated difference (432) matches the actual difference (432) between 491 and 923.

Conclusion: Based on the above analysis, we can conclude that all the numbers in the given series follow a consistent pattern. Therefore, the wrong number in the series is NOT present.

This sequence follows this pattern