What should come in place of question mark in the series given below ?
92,`"? "`,46,69,138,345

Answer

To find the missing number in the series 92, "?", 46, 69, 138, 345, we will analyze the pattern in the series step by step.

### Step 1: Identify the relationship between the numbers
We start by examining the numbers we have: 92, ?, 46, 69, 138, 345. It seems that the series alternates between decreasing and increasing values.

### Step 2: Look at the known numbers
From the series, we can see:
- The first number is 92.
- The third number is 46.
- The fourth number is 69.
- The fifth number is 138.
- The sixth number is 345.

### Step 3: Analyze the relationship between consecutive numbers
1. From 46 to 69:
- 69 - 46 = 23
- This indicates an increase of 23.

2. From 69 to 138:
- 138 - 69 = 69
- This indicates an increase of 69.

3. From 138 to 345:
- 345 - 138 = 207
- This indicates an increase of 207.

### Step 4: Determine the pattern of multiplication
Now, let's analyze the relationship backwards from 46 to the missing number (denote it as "?"):
- If we assume the pattern involves multiplication, we can see that:
- 46 is half of 92 (92 * 0.5 = 46).

### Step 5: Calculate the missing number
To find the missing number:
- We can assume that the missing number is obtained by multiplying 92 by a certain factor. Since 46 is half of 92, we can deduce that the missing number must be 92 multiplied by 0.5:
- ? = 92 * 0.5 = 46.

### Step 6: Confirm the missing number
Thus, the missing number in the series is:
- ? = 92 * 0.5 = 46.

### Conclusion
The missing number in the series is **46**.

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